Why I’ve not been posting so much recently

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I’m afraid I haven’t been posting as much as I would like. This is due to several things. Firstly I have the bad habit of having multiple projects on the go, so each individual one takes longer to complete than if I did them one after another, although it does mean I approach each one refreshed on a regular basis. Secondly, I have a full time job, so between that and the commuting and such, I don’t have the time and energy to do experiments and research that I did 3 or 5 years ago. I can at least afford to buy some new equipment.

Having said that, I am almost back to normal with regards to energy and fitness, the problem there being that I have to regularly exercise to maintain it, including climbing mountains and suchlike, which of course takes up time that could also be occupied by experiments.

Finally, the most important reason is that I am getting on with the long mooted book on alchemy that I started at the end of 2010. Had I known then what I know now about how complex alchemy is and how tricky the experiments can be, I’m not entirely sure I would have started writing it. Nevertheless, it is at least half complete, with every chapter at least roughed out. The only thing is, I need to do more experiments, and because they are going in the book I can’t put them online, otherwise why would you buy the book?

I also need to find a publishers. All suggestions welcome, but bear in mind this is a popular introduction to alchemy with lots of colour pictures, which will somewhat limit the interested or indeed capable companies.

I’m also pushing on with my experimental history of alchemy research, for which I have already done some test work reported on here, now I just need to repeat it all, with better equipment than I had last time, and write it up. Research for the write up stage is ongoing, but of course takes time to do as well.

Finally, it can be hard to find actual alchemical experiments and related topics that I can do, because either they involve really nasty chemicals, or else I’ve already done them. So as usual all suggestions welcome.

And another one bites the dust

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The cucurbit I used a couple of weeks ago for a distillation broke when I held it by the neck. Being pyrex I thought it would be a bit stronger, but obviously the weight of lute around the bottom and some sort of flaw in the glass, perhaps brought on by too much heat or the time I heated it without lute and it changed shape slightly, meant it could only do a few more high temp distillations.

When I picked it up by the neck, the base dropped off onto the floor and the lute was cracked off it:

broken luted cucurbit

When I looked closer at the break point there was some copper on the outside of the glass, stuck in the lute, suggesting that a hole had opened up at some point in the distillation.

Broken edge of cucurbit

Ah well, I shall have to buy a new one, or make that several, because it seems they don’t last long enough. This time I shall know to be even more careful with it. It actually make the 3rd pyrex cucurbit I’ve broken over the last 9 years, but then I’m not doing as many distillations as I would like.

This kind of breakage was a common problem for alchemists, which is both why they luted cucurbits and complained about the fragility of glass and stuff. Well, having written that, I can’t immediately find any nice and relevant quotes; if you can think of any please let me know.

Actually, sometimes I think I’m engaged in making broken stuff for beginner archaeologists to study. Maybe I need to find someone willing to pay for real soda glass equipment and we can study how well it survives being used.

 

The importance of good lute

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Once again whilst distilling I was reminded of the importance of a good lute. That is, the stuff that serves to hold the glassware together, forming a strong and impervious seal. Various recipes are given, depending on the circumstances and author. John of Rupescissa suggested paper, egg white and fine flour, which works nicely, especially with modern ground glass joints when making the quintessence of alcohol.

I wrote about lute a couple of years ago:

https://distillatio.wordpress.com/2013/09/24/the-lute-of-wisdom/#more-329

The obvious point is that the lute for glassware involves egg whites and stuff to hold them together, usually a mix of organic and sometimes inorganic stuff. The net result can be like this:

 

 

Lute at alembic and serpent

Which is egg white, fine flour and fine linen. It is not exposed to any temperature above 100C, but that is certainly enough to start cooking the egg and flour, which just so happens to make something a bit bready that expands slightly and seals any gaps. It also has the advantage of being easy to put in place, because it is soft and squishy. It certainly works and prevents the dangerous and irritating loss of the substances being distilled.

In fact that makes me wonder when it went out of use. So, off to the old chemistry textbooks!

(Fortunately I collected a lot of scanned ones from archive.org a few years ago when researching a few things)

In the 10th edition of Griffin’s Chemical Recreations, from 1860, mention is made on page 180 of the old use of cork and cement, prior to the invention of cork borers and caoutchouc-tubes.

Various other textbooks don’t really go into practical chemistry at all.

So a question that will take a lot longer to answer than I had hoped.

Anyway, here’s another picture, this time showing my new serpent in action:

New serpent in action

There’s over 3 feet of glass tubing here, which is just enough for the distillate to cool down and drip out of the end rather than rushing out as vapour, which was always a problem I had before. Note the coloured fabric, which is offcuts from my various re-enactment clothings, which are soaked with water. These hold the water close to the warm glass, which then heats them up and the water evaporates, helping cool the glass and then the vapour within it. You can even see steam rising from the cloths, although not in this photo.

 

 

 

Alchemical texts written and copied in 15th century England – how many survive?

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A simple question, with a full answer beyond the scope of a mere blog post. Nevertheless I find the question interesting as a way of roughly gauging the popularity of alchemy in that period and the activities of the alchemists. The century was certainly one in which it became more widely known and translation from Latin to English got going. By at least knowing how many MS have survived, we know that more have been destroyed or lost in the meantime, and therefore can make vague estimates of the production of them. Moreover if some expert were to examine them all and compare the handwriting we could tell how many people were copying manuscripts, either for their own use or for whoever was paying them.

I have already noticed that medieval University library catalogues were rather short on alchemical works: https://distillatio.wordpress.com/2015/12/07/how-widespread-were-alchemical-books-in-britain-in-medieval-times-and-who-owned-them/

That and what I have read about manuscripts suggests that they were copied and circulated privately. So unless you could afford a scribe, or were concerned with secrecy, you would do the work yourself. Which naturally limits the copies you could personally make, and does raise questions about how much the works were passed around.

The difficulty in estimating numbers of surviving MS is of course how many places have MS. To start with, there is the British Library. Then there are the various university libraries, with Cambridge and Glasgow having good collections. Not to mention libraries abroad as well. All of which makes this a very partial summary.

Continue reading

In search of orange

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It occurred to me that it would be nice to be able to dye cloth orange. So, looking in “Colours from nature” by Jenny Dean, I found a number of methods.

Here is the first one, on the left is a red made as normal with no mordant piece of wool, and on the right of it the same stuff, no mordant, but heated for a while in a madder solution with vinegar added to it:

dyeing orange photo1

You can see that the result is very red for the original madder, showing it can dye without a mordant, albeit it is a darker red because I heated it strongly. Making the solution more acidic made it kind of orange, but unevenly and it looks rather odd.

Two other uses of madder were tried. One was unheated, no vinegar solution, no mordant, left to soak for some days. The other was the left over solution of madder and vinegar. The first one on the left was in the solution for half an hour to an hour with some agitation now and then. The second was left in overnight for at least 12 hours, both being from the left over solution.

dyeing orange photo2

The third one on the right was from the unheated solution, and spent 2 days in it, no vinegar used.

The result is that the unheated soak for a few days gave a very light, not very good orange, not acceptable really. The best result was from the slightly warm older solution of madder and vinegar, the colour is deep, and what we think of as orange. The long soak was just too long and the colour isn’t right.

Thus the best madder one was a long soak in the cool acidised solution. If I’ve remember the order I did things in properly….

It seems that using brazilwood with an acidic modifier gives an orange as well. Again, using vinegar as the modifier, I put some brazilwood into a beaker and heated it with the same wool as before. The result was somewhat poor. I heated and nearly simmered the brazilwood for nearly 45 mins as it said, then put hastily alum mordanted wool into it, and boiled it for another 45 mins, left it to soak for 2 or 3 hours, and the result was the fabric on the far right of this photo:

dyeing orange photo3

Pretty bad really, it was a lot easier to get a red with the brazilwood than orange.

Of course the slight problem is that I am not really sure what the medieval method of getting orange was. Just to add to the difficulty, the word “Orange” was quite new to the language, appearing in the late 15th/ early 16th centuries, and what the Tudor Tailor people sell as something approximating orange is called tawny:

http://www.tudortailor.com/shop/?item-details=171383692&item-name=Tawny-Gold-Brown-Tudor-Style-Woollen-Cloth—fabric-sold-by-the-half-yard

(Ref. For orange is page 159 of “The senses in late medieval England” by C. M. Woolgar)

Said book by Woolgar also says that tawny was a mottled cloth of orange, brown and yellow colour, which I assume means it was dyed in the skein, i.e. the threads that were to be woven were dyed, not the finished cloth.

So I feel happy enough dyeing cloth this colour, although perhaps only for late medieval use onwards.

What I have had trouble finding is actual period recipes online. I am not aware of many books on medieval dyeing that look at the topic as a whole, rather there are scholarly papers on specific aspects, and many books on using plants to dye with, and not so much that links them together. If anyone knows of any I would be grateful, otherwise will be reduced to badgering dyers I know to write such a book.

Here’s one colleciton of links:

http://www.elizabethancostume.net/dyes/

unfortunately many are broken.

There is also this scholarly set of links, which looks interesting:

http://www.cs.vassar.edu/~capriest/dyelit.html

Oh yeas, a quick note on the chemistry. The Alizarine molecule (see here: http://homepages.gac.edu/~jimholte/documents/JCE1981p0301.pdf) which is the main constituent of the redness changes colour depending on the pH of the solution, or so wikipedia says. Once again though I find the major problem is that according to the internet, the only source for this information is a paywalled paper from 40 years ago, and nobody else at all knows what actually happens with it all. Or rather, they all repeat the same information picked up from somewhere years ago, which is no use at all to me. The closest I can find to useful information is from 19th century scientific papers, which are all paywalled. Naturally not being part of a university is a handicap.

Naturally they didn’t know about the chemistry back then (I must try and see if there were any medieval theories of how dyeing worked) but they would have experimented with different additives and mordants and used what worked for them. Some towns had good water for dyeing, and became famous in part because of that. Others had hard water with lots of calcium and that tends to make dyeing poor.

 

 

 

 

The part medieval alchemy played in the scientific revolution

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Introduction

There have been a lot of books and articles discussing the scientific revolution that took place in the 17th century. However, even after 9 years reading and research, I’m still uncertain about the precise place of alchemy in the scientific revolution, meaning what part alchemical ideas, knowledge, experience and technology played in it.
Which is silly, but there you go. Part of my problem seems to be that the closest thing to such a discussion that is easily available is in the book “Alchemy tried in the fire” by Principe and Newman, which is about George Starkey and his alchemy in the 17th century, and how (quoted from the back cover of said book) “… that many of the principles and practises characteristic of modern chemistry were already present in alchemy.”

The problem for my understanding being that the book is focused on Starkey’s work and ideas of other alchemists near in time to him, and that it is written in an academic style with a great deal of supporting detail. Moreover, the main link to medieval alchemy being the works of pseudo-Geber, (which Newman identifies as being Paul of Taranto) and specifically the interest in testing and use of the balance, which he traces back to Arabic sources, but, there is a much wider world of alchemy out there which Newman doesn’t bring in as relevant, whereas I think a lot of it is. Whilst it is good practise to be specific and narrow about exactly what you are are saying and the evidence you use to support it, Newman has this tendency concentrate only on the specific few sources that he knows in detail, and appear amazingly confident about his sometimes broad statements, which just rubs me up the wrong way even if he is correct.

(More information about the place of alchemy in the scientific revolution is undoubtedly available in academic papers, but they are harder to get hold of and are rather a jungle, so I just don’t have them)

It turns out that I considered this topic 3 years ago, when this blog was young:

https://distillatio.wordpress.com/2013/02/27/so-what-has-alchemy-contributed-to-science/

Re-reading it, I find that it is rather short and lacking in detail. I still stand by the conclusion at the end: Continue reading

Trying to work out practical recipes from 15th century English Alchemical poetry

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This post brought to you courtesy of Anke Timmerman and the Knowledge unlatched consortium (https://twitter.com/KUnlatched)

The tweet:

https://twitter.com/guthrie_stewart/status/694623570245357569

was obviously a challenge.

Her book can be found here, and can be read online for free:

http://booksandjournals.brillonline.com/content/books/9789004254831

Now, onto the recipes, or at least some of those in English that I can read:

The prose text “Lead”, found on page 313, starts with the simple manufacture of lead acetate, and the distillation thereof, which produces the usual red liquid that is a weird mixture of organic substances. This is no different from the Ripley method suggested by Jennifer Rampling, and I think also that which is produced from John of Rupescissa’s quintessence of alchemy recipe.

It even says to put the stilled liquid upon the stuff left behind in the alembick, which Ripley recommends, but then you put it onto silver and make it brittle.

At this point I start to wonder if it really means lead, and doesn’t mean some other thing. The description of thin plates, vinegar and the resulting white powder is clearly of lead acetate though, I’ve not heard or seen anything else give such a result.

More specifically, the instructions say to put the distilled liquid back onto the white product of calcination of the stuff left after the distillation. Why it would be white is unclear to me, since if it is lead it should be blackish after calcination. So perhaps something unusual is happening here.

Or of course the poem is not meant to be taken practically.

The Thomas Hend text on page 317 is also clearly a lead and vinegar one. It has suddenly become clear to me how variations in the concept were all the rage in late 15th/ early 16th century England. You see this a lot in alchemical recipes, new fashions in activity and substance that sweep across Europe or countries and hold sway for decades, until something else comes along. That vinegar had been used in earlier recipes is not in doubt, but what happened in the later 15th and early 16th centuries was the codification and spread of specific series of actions which we could dub Ripleyan. These recipes continue to turn up in alchemical literature into the 17th century, in the works of Basil Valentine, as explored by Lawrence Principe.

I define them specifically as ones that on the surface use vinegar and have metals, oxide or carbonate, dissolved in the vinegar. It is then distilled, and a red liquid produced. You can get a reddish liquid from such a process, as I have proved myself (https://distillatio.wordpress.com/2013/11/19/382/) and as modern esotericists have also shown. The only slight problem is that things start to diverge from what you would expect given modern chemistry and it all gets a bit complicated and the best thing to do is stop and do something else for a while.
Or do more experiments and read more sources, both of which I am planning on doing this year.

Transmission of alchemical ideas via travellers and books

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Obviously alchemical ideas and practise had to be communicated between people, by word of mouth or writing. But we are lacking in information about a lot of the information transfer in the past and exactly how it happened. This is a big, sprawling topic that I didn’t really cover in my book (http://www.newcurioshop.com/alchemy-medieval-tudor-england/),

so I am attempting to summarise some of my thoughts about it now.

Concentrating on Europe, and England, the earliest transmission was by learned men travelling to Spain and Sicily, to translate or copy alchemical and other related works on things like astrology and natural philosophy. They then returned home with a copy or two, or the copies were given as gifts to places of learning, or they went home and mentioned alchemy and such in their writings at home. The latter occurred with information about the four elements, as the translator Daniel Morley, who had copied and translated works abroad, being asked to write about this knowledge when he returned home to England in the 12/13th century. The books in places of learning were then copied by other visiting monks/ copied and given as gifts/ read by visitors who made their own notes, and thus the information filtered northwards.

Naturally this meant a very slow rate of transmission. It wasn’t until the 13th century and Roger Bacon before we really have much talk about Alchemy in England, but even then there’s not really much evidence of anything until the 1310’s and 1320’s, when it started to get rather busy and crops up in various circumstances, from legal records to an archaeological find in Cambridge.

But Bacon got his information from copies of only a handful of texts, perhaps picked up when he was in Paris. Bacon’s sources were, according to the article by William Newman on him in “Roger Bacon and the Sciences – commemorative Essays”, edited by Hackett:

an alchemical work attributed to ar-Razi, called the Lumen Luminum, another false work attributed to Avicenna called the Liber de Anima, as well as of course the Secreta Secretorum of pseudo-Aristotle.

He was basically working from texts, apparently with no transmission of secrets and ideas and practise in any other way. Moreover they were Arabic texts, translated into Latin and passed about between learned men and copied until Bacon made his own copies or purchased ones from people. In fact in his Opus Tertium he claimed to have spent “…more than 2,000 livres in these pursuits on occult books and various experiments and languages and instruments, and tables and other things.” (From page 119 of the Dover paperback of Holmyard’s “Alchemy”)

The 1330’s were also an interesting time with regards to other alchemical authors with the writing of The Testamentum of Raymond Lull, a pseudo-Lullian treatise, an early version of which claims to have been written in St Katherine’s, London, England in 1332. Unfortunately this was written in Catalan, so whilst the work itself may have been written at the time and place claimed, it didn’t have any effect on English alchemy, and the earliest mention of Lull as an alchemist is apparently from the 2nd half of the 14th century, according to Michela Pereira. Moreover he didn’t really appear in English alchemy until the 15th century, when we find a translation from Catalan into Latin or English taking place. So here we have a possible occurrence of a roundabout route of works, hampered by the use of a minority language (Catalan), and the importance of a universal language, i.e. Latin.

Later on, you can see that the audience for alchemical works and numbers of alchemists that we have record of greatly increases as the texts are translated into the local language in the 15th century and more people can read and write. The Semita Recta was translated into English, French and German from Latin in the 15th century, and many of these copies have survived. People passed it around interested parties who then made their own copy or had one made for them. There is evidence for a circle of alchemically interested intellectuals and doctors in 1440’s England, related to the Semita Recta and various pseudo-Albert of Magnus works. They would likely meet and discuss alchemical matters when possible, and pass on manuscripts or copies of them to each other.

I see no reason to doubt that similar things were happening all across Europe, with educated men, both professional and mere servants and artisans, learning about alchemy from each other and what works they found.

George Ripley, the famous 15th century English Alchemist, allegedly travelled abroad in order to learn more about alchemy and other topics, and by the 16th century we have various learned men writing about collecting books from the continent themselves, or their friends are asked to pick up what books they can find. Of course this was also the age of printing, and of a wider community of letters that was different from the earlier one in the 13th century.

Jennifer Rampling has written a paper (Available here: https://www.academia.edu/4760830/Transmission_and_Transmutation_George_Ripley_and_the_Place_of_English_Alchemy_in_Early_Modern_Europe) about how John Dee and Edward Kelly, in their peregrinations about Bohemia and Eastern Europe, spread knowledge of the works of George Ripley, which in turn were used by the alchemists in the late 16th/ early 17th century in their own writings and were also printed in books.

Another issue in consideration of alchemical knowledge transfer is that of transmission from master to pupil. If that was all that happened, then that would mean that alchemy was a rather different subject than what we think of it as being today. (I wrote a blog post on this 18 months ago: https://distillatio.wordpress.com/2014/08/04/is-there-much-evidence-for-direct-master-pupil-transmission-of-alchemical-knowledge-in-the-13th-to-16th-centuries-and-how-much-did-initiation-matter-versus-learning-from-books/)

However that clearly was not all that happened, although we have several claims about it taking place from the 15th and 16th centuries in England. But perhaps because it was seen as a Donum Dei, a gift of God, the alchemist could learn from books (After all, the Bible was a book too) and ultimately it was God that would give him the knowledge to make the stone. Also the idea was abroad in the later medieval period that it was legitimate to interrogate God’s creation to find out better how it worked, and as such, learning how do transmutation from books and by experimentation was entirely okay.

What I do wonder about is how useful alchemy was as a marker for being well educated, which could open some doors for your career, and also as a means of rubbing along well with people of other nationalities. There was to some extent still a pan-European feudal society, with people of the appropriate status mingling easily with each other and having languages and habits in common. Of course by the 16th century that had fragmented with the rise of nationalism and the reformation. I suspect though that it proves more useful in that regard in the 17th century, with the appearance of Rosicrucianism.

Certainly religion was important; it turns out that an Irish humanist called Richard Stanihurst (1547-1618) graduated from Oxford, and began alchemical studies in London, but he was a Catholic and left England, working in the Bishopric of Liege, where he was involved in the Paracelsian movement, and he ended up at the court of King Philip II of Spain. I doubt he would have been permitted to attempt to cure various diseases using alchemical methods if he was a Protestant and probably would not have left London. What seems clear from the summary of his life in the summary of Azogue no. 4, is the importance of groups of alchemists/ chymists/ medical men for passing knowledge and practises and supporting research. Stanihurst would surely have had a much harder time of it without support from the likes of the Bishop of Liege and others in the same area. As with the dissemination of Ripleyian alchemy, patronage is an essential part of the travels made by knowledgeable people and dissemination of their works. Unfortunately the issue is that the evidence for earlier ones, such as in the 13th century, just has not survived.

So, to summarise it – alchemical knowledge travelled with people as they travelled, and by written texts as they were traded and given and received. It was retarded by language problems, and by distance, and made easier by patronage from the rich and powerful.

Things alchemy was related to and helped with and used by

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This is a short blog post covering an interesting but rather deep topic which would require a great deal more research to make a full on really interesting post. So instead you have to make do with this. Maybe in a few years I’ll write something more.

Right from the start, alchemy was related to other areas of endeavour or crafts. The recipes in the Physika et Mystika are similar to and sometimes the same as those found in the manuscripts recording various craft recipes, the Leyden and Stockholm papyri. Basically the early alchemists took ideas from Hermetic and gnostic religion and mixed them with physical workshop practises.

It seems clear to me that early alchemy was actually a form of philosophy and mysticism and religion; I use all of those words because although an expert could probably make specific distinctions, it is beyond me in the case of the Physika et Mystika and many of the other texts written by Cleopatra or that refer to Isis.

And this stayed with it into the Byzantine Christian era, with explicitly Christian imagery and metaphor added to Hermetic texts such as Zosimos “On the Letter Omega”. Some of the later alchemists surely enlarge the natural philosophical side of alchemy as well, making it less specifically religious, more an explanation of how the world works. The making of gold is treated as a specific work that can be done, not with religious implications, but rather due to knowledge of how the world actually works. This can also be seen in the works of Zosimos of course. Continue reading

Sometimes I think people don’t know what Alchemy is, or else they don’t explain why they think there is alchemy in what they see

Sparked by this:

http://www.bl.uk/manuscripts/FullDisplay.aspx?index=5&ref=Harley_MS_3353

I have been following the British library’s MS digitisation program for a while, waiting for it to get to alchemical works. Unfortunately the one linked to above seems to have been oddly labelled.

 

Here is the list of contents:
1. Macer Floridus, De viribus herbarum (ff. 2r-38v); (a herbal, too early for alchemy in western Europe

2. Marbod of Rennes, Liber lapidum seu de gemmis (ff. 39r-54v); ( about gemstones, no mention of alchemy according to my sources, but of course discussion of the 4 elements in how gems are formed.

3. Pseudo-Ovidius (Thierry, abbot of St. Trond?), De mirabilibus mundi, hexameter verse (ff. 54v-57v); ( appears to be a Roman era collection of natural history, geography etc, by Gaius Solinus, but here seemingly attributed to someone else.

4. Johannes Philosophus, Summa chiromantiae (ff. 58r-66v); ( Palmistry

5. De quatuor temporibus anni (ff. 67r-69r); (a short pamphlet on natural history, the 3 seasons, might be this: http://faculty.virginia.edu/OldEnglish/aelfric/detemp.html

6. Doctrina Henrici libello de imagine mundi (ff. 69v-70v). ( Described by the BL as “A brief text on humours with the title ‘Doctrina Henrici libello de ymagine mundi’ added later;”

7. Office of the Passion, Matins, excerpt (ff. 70v-75v); (A devotional office of the period

8. Johannes de Sacro Bosco, Algorismus (ff. 76r-86v); (Introduced Hindu-Arabic numerals to European universities according to Wikipedia

9. ‘Tractatus super Arithmeticam’ (ff. 87r-114r); (Seemingly a mathematical treatise, not much information to be had.

10. Johannes de Sacro Bosco, Computus (ff. 114v-144); (More mathematics?, but not much info on it can be found.

11. Notes on arithmetics and a drawing of the Virgin (ff. 144v-146r); (Does not appear to be alchemical

12. Pseudo-Ovidius, De vetula, excerpt (ff. 147r-147v); (This is a 13th century elegiac comedy written in Latin.

13. Odo of Tournai, Rhythmomachia with tables (ff. 148r-157r, 157v-159v); (Is apparently a board game!, see more at wikipedia: https://en.wikipedia.org/wiki/Rithmomachy

14. Chronicle relating to the year 1291 (ff. 160r-177v). (I cannot read it, but it seems likely that a chronicle isn’t about alchemy.

Note the general lack of actual alchemical texts. The “Composite miscellany relating to medicine, alchemy and mathematics(quoting from the BL description) itself is from the 2nd half of the 13th to mid 14th centuries. I suppose the nearest modern equivalent would be a pile of university level textbooks on a variety of topics, especially maths, plant based medicine, and some religious thought. It should be emphasised that the works in this collection are not the sort of populist type of book you might be familiar with nowadays; the very fact that they are written in Latin means that only the tiny fraction of the population who were literate in it means they were for the intelligentsia, hence my description as university level textbooks.


Chiromancy is basically palm reading,
but looks at the entire hand, not just where some of the lines on the palm are. Interesting to find it in such an early, scholarly text, but it seems it is a definite interest of medieval scholars, even if not actually treated as a part of their intellectual endeavours. It seems to have been something of a holdover from older ideas about how the world worked.

I found some information on it here, that seems to refer back to original treatises, and therefore should be useful:

http://www.johnnyfincham.com/history/summa.htm

But it is certainly not alchemy. Neither are gems. Although wikipedia says this about the Book of gems by Marbod of Rheims:

The most popular of Marbod’s works was the Liber de lapidibus, a verse lapidary or compendium of mythological gem-lore; by the fourteenth century it had been translated into French, Provençal, Italian, Irish, and Danish, and it was the first of Marbod’s works to be printed.[5] (Obviously it’s wikipedia but it refers to pukka sources)

Marbod himself lived from about 1030’s to 1123, and seems to have had homosexual attractions but did not believe in actually consummating them.

Now, in summary, the manuscript Harley 3353 can be said to be evidence for a person or persons interested in many things about the world, how it works, how it is structured, etc, and dedicated to thinking about all this in a way which is not exactly familiar to modern folk. Yet I can find no definite evidence for alchemy in the texts within it, so the question is, why does it have that tag attached to it?

Maybe I should ask the BL.

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