Category Archives: Tools and Techniques

From the Hearth to the Gas Stove: A Study in Apricot Marmalade

By Marissa Nicosia

The early modern hearth and the modern gas stove are rather different technologies for controlling heat. Again and again in my recipe recreation work for Cooking in the Archives, I encounter complex instructions for managing cooking temperatures on a hearth and try to translate those instructions to my own equipment. To what temperature should I set my oven? How high should I turn up the flame under the pot? What volume of water should I add when boiling water is called for and no volume is specified? How long should everything cook?

Early modern recipes trust that cooks know their hearth and ingredients well. Some recipes are very precise about weight and volume and others read like general concepts on which a cook might improvise as best suits their needs, inclinations, or tastes. Cooking these recipes on a hearth with variable fire types and temperatures demanded a skilled cook who could manage heat effectively.

This is the part of updating recipes that most challenges me: I have a PhD in English, but no formal culinary training. This is also the part of updating recipes where I have been most challenged by others. Members of the historical reenactment and historical interpretation communities have in turn urged me to try these recipes again on a hearth to taste the different flavors the fire instills and chastised me for attempting to cook these recipes without a hearth in the first place. As I grow as a cook and expand this project, I’m going to accept these kind invitations to cook alongside skilled recreators [1]. But Cooking in the Archives is a project designed to give all readers a taste of the past: even if those readers possess only the tiniest apartment stove. That’s the kind of stove that I had in my West Philadelphia rental when I launched the site with Alyssa Connell in 2014.

In order to cook these recipes on my stove, I have to determine some basic information: Is this something I should make on the stovetop or in the oven? In a pot, pan, or roasting dish? Is the recipe asking for water and should that water be boiled first or with the ingredients? To answer these questions, I naturally start with the recipes themselves. The phrases recipe writers use for the ferocity or gentleness of the fire are subtle, but informative. Then I look at recipes in modern cookbooks. The “Jumball” cookie mix looked like a shortbread cookie so I started with the oven temperature from a familiar cookie recipe and kept track of the time [2]. These are skills that I learned from baking growing up and cooking for myself while I was in graduate school, but not, exactly, skills that I learned in the academy. Neither humanities course work nor historical recreation holds all the answers for how to, say, make an apricot marmalade from a late-seventeenth-century culinary manuscript in a twenty-first century kitchen.

This recipe “To make Marmalaid of Apricocks” is from Ms. Codex 785 at the Kislak Center for Special Collections, Rare Books, and Manuscripts at the University of Pennsylvania. I’ve prepared quite a few recipes from this specific manuscript, and this recipe, like a few others in the volume, derives from Hannah Woolley’s cookbook The Queen-like Closet or Rich Cabinet (1670) [3]. This marmalade is both fragile and delicious. It needs the careful tending outlined in the original recipe. I have attempted to convey this level of care in my updated recipe at the end of this post.

To make Marmalaid of Apricocks

Take Apricocks, pare them and cut them in
quarters and to every pound of Apricocks
put a pound of fine Sugar, then put your
Apricocks in a Skillet with half the Sugar
and let them boil very tender, and gently, and
bruise them with the back of a Spoon, till they
be like pap, then take the other part of the
Sugar, and boil it to a Candy height, then put
your Apricocks into that Sugar, and keep it stirring
over the ffire, till all the sugar is meted, but
do not let it boil, then take it from the ffire,
and Stir it till it be almost cold, then put it
into Glasses, and let it have the Air of the
ffire to dry it.

Images 1 & 2 – The recipe in Ms. Codex 785, 6-7

The recipe asks you to boil the apricots with sugar until the fruit is so tender that it breaks down into a luscious pulp. Then the recipe instructs you to make a simple syrup of sugar and water and allow the mixture to come to candy height or what we would now call the soft-ball stage. Early modern cooks would have been especially skilled at the subtle art of watching sugar change under the influence of heat. The cook is next told to stir the apricot puree into the hot sugar over the fire and then off the fire until the mixture is almost cold. The final instruction: “and let it have the Air of the ffire to dry it” is the most evocative image for me. The preserved apricots in glass containers glowing in front of the hearth.

This apricot marmalade is delicious on toast, lightly crisped by the heat of a toaster oven or toaster, of course.


An Updated Recipe

8 apricots (7 oz, 200 g)

generous 2/3 cup sugar (7 oz, 200 g)

1/3 cup water

Peel the apricots, remove their pits, and cut them into quarters. Cook them to a pulp with half the sugar. The apricots will release their own juices so no water is necessary here. (Approximately 10 minutes.)

Make a simple syrup with the remaining 1/3 cup sugar and 1/3 cup water in a saucepan. Use a candy thermometer to keep track of the temperature and cook until it reaches candy height/pearl stage 240F on the thermometer. When the syrup has reached this temperature, add the cooked apricots to it. Stir to combine over the heat, but do not allow the mix to boil.

Remove from heat and stir as the mixture cools. Transfer into a clean jar. This amount of apricots and sugar nicely filled an 8oz jelly jar.

Keep refrigerated and eat within two weeks. (You can also properly can this for longer storage.)

[1] Johnson’s work in particular suggests what traditional academics can learn by spending time with reenactors and participating in reenactments. Katherine M. Johnson, “Rethinking (re)doing: historical re-enactment and/as historiography,” Rethinking History 19, no. 2 (2015): 193-206.



HEAT! A Recipes Project Thematic Series

Astronomy- the Earth and the sun during summer in the Northern hemisphere. Wellcome Collection.

As humans, we want to control heat. We want to create heat, temper or even extinguish it, depending on context and purpose. We have a very limited temperature range at which we are comfortable (some microbes and bacteria can survive temperatures as low as -20C and as high as 130C), so we spend an incredible amount of time managing heat, whether it is our body temperature or that of our homes, offices, laboratories, cars, or food.

When we started planning this series of blog posts in early May, we could not have suspected how appropriate the theme would feel by now. While much of northwestern Europe has not seen rain in weeks and is sighing under a heatwave with temperatures rising to 37C/98F, we have fled to airconditioned spaces to edit the posts. Climate-wise, heat is seasonal in these regions, but it has always played an important role in recipes year-round, all around the world, from antiquity to the present day, in fields as diverse as alchemy, chemistry, art, cooking, medicine, and personal grooming.

The common denominators of heat in all these realms are that it is either internal – emanating from the human body – or external, naturally occurring from the sun, thunder, or lava, or man-made through friction or fire. In the posts in this series, we will see a wide variety of attempts to control these different kinds of heat through recipes and instructions.

Managing natural heat: Venice turpentine is a thick paste (aka sticky mess) at room temperature, but becomes fluid around 25C, and nicely mixes into the rest of the varnish ingredients when left out in the sun. Photo: Marieke Hendriksen

Some of our authors recreate such attempts by reconstructing experiments outlined in historical art technical and chemical sources. Indra Kneepkens recounts how she discovered through reconstruction research that sometimes for a recipe to make sense, it should not only be followed to the letter, but also be read between the lines. Ruben Verwaal and Marieke Hendriksen use their experiments with two reconstructions of small chemical ovens to reflect on the role of experimental heat in the development of theories on the nature of life in the eighteenth century. Working in a similar vein but with culinary recipes, Marissa Nicosia, from Cooking the Archive, examines the problem of heat control in her recipe recreation adventures, outlining the challenges of translating cooking instructions meant for the early modern hearth to the modern gas stove.

The four elements, four qualities, four humours, four seasons, and four ages of man. Airbrush by Lois Hague, 1991. Wellcome Collection.

Other authors in the series took our invitation as an opportunity to investigate heat in medical theories across time and place. Aileen Das kicks off this series by arguing that heat occupied a central place in ancient Greek, Roman and medieval Islamicate theories about the human body and its care. Taking on the smelly problem of perspiration and body odor, Cari Casteel reminds us that this issue is as old as mankind and offers several remedies from Roman authors.  Catherine Rider, on the other hand, examines notions of heat in fertility remedies in medieval England, noting that, whilst popular, heat-based treatments (to either increase or reduce heat in the body) were not the only kind of fertility aid available to English couples. The series concludes with two posts focused on fever and disease. Writing on in Late Imperial China, Marta Hanson introduces us to ideas of fever in Chinese medicine. Finally, Nukhet Varlik turns our attention to the ambiguities inherent in early modern taxonomies of infection diseases, exploring fever as a symptom and as a disease category.

We’ve had a great time editing this series – hope you enjoy reading the posts wherever you are. Happy summer and stay cool!

Marieke Hendriksen and Elaine Leong

P.s. We were so inspired by our contributors’ posts that we’ve decided to dedicate the December issue to (you guessed it) COLD!. If you’re interested in joining the conversation, send a short pitch to

Counting on the body: Reflections on Numeracy in Indian dyeing practices

By Annapurna Mamidipudi

‘I don’t know how to read, but I can count’ said Salim, ‘I was not much for school, my father put me on an old tractor when I was 12, and told me to go around in circles, till I had learned to drive’. Salim was a 20 something driver, the same age as me, when I met him in 1990. I –along with a few other socially minded engineers – was trying to decipher the recipes from a century old colonial account of dyeing using natural materials, and he was hired to drive me around the weaver villages we were visiting in rural Andhra Pradesh in South India.  The idea was to use these recipes to bring natural dyeing practices lost over the last century back into the practice of craftspeople, in order to enter newly emerging green markets and support their livelihoods.

‘Keep the temperature around 70 degrees’ specifies the recipe. Yes, I could measure the temperature and tell when it was 70 degrees; but how to maintain a constant one? Salim smoked incessantly, yet he could blow on an open wood fire under the dyebath to keep it at a steady 70 degrees for as long as it took to extract the colour –whether yellow, brown or red. I measured and jotted down notes from his experiments, attempting to standardise a recipe that would provide fast colour across the different dyehouses, in the different villages where craftspeople were being trained to re learn natural dyeing practices. But this was an important first lesson about the material life of numbers in dyeing –they came attached with fires, smoke, dye baths, and always required a willing body to maintain them.

Indigo dyed yarn production in a weaver co-operative dyehouse © Moody Chetanand

So my first recipe:

Material needed:

For one kg. of yarn, take  15%  in weight in dyematerial Katha [Acasia Katechu]

Copper Sulphate: Take 10 % of weight of dye material

First measure out the quantity of dye material…….

‘Weavers don’t read, why would you want to write down a recipe in English?’ Salim interrupts, with some curiosity. The recipe is a formula, I explain, and it has to hold fast wherever we use it, and whoever uses it. It can be in any language, its the numbers and reproducibility that make it technical. ‘My car is technical, but I don’t need a manual’ he jokes, even as he measures out quantities out aloud for me to write into the journal we keep of all the dye experiments. After using the recipe on the field in a series of training workshops for weavers, he makes an observation. ‘Change the recipe standard to 4.5 kg, not one kg, if you want a stardardised recipe’. I reply patiently, if they learn to calculate quantities using the standard of 1 kg, they can multiply it by 4.5 or any number they chose, that’s the whole point of a recipe. ‘But they only use the 4.5 kg standard, or multiples of it, so if you write those down in the recipe, they don’t need to learn how to calculate percentages’. He is right, I realise, all across the world of Indian cotton handloom weaving, the general measure that applies across all dyehouses, is the weight of one box of cotton yarn, the ‘peti’, standardised across all thicknesses or counts of yarn. I change the recipe; we now formulate all recipes with 4.5 kg as the base. I need a calculator to figure out how much copper sulphate we need for the recipe for Katha, each time, meanwhile, Salim is measuring it out by hand. ‘Sometimes the quality is not so good, you have to add a bit more’. The weavers agree, accuracy is about the outcome of colour, not so much the weight of material as input.

Sample of jottings from a dyehouse in Peddapuram in Andhra Pradesh © Moody Chetanand

Almost ten years later, Salim is a master dyer, and well on his way to acquiring the skill of dyeing Indigo, one of the most difficult colours to master. He is successful in the market, and has trained more than a hundred artisan groups, forming a large network of dyers. I continue to be the documenter of recipes, now trying to author a small booklet of recipes in the four South Indian vernacular languages, for craftspeople learning natural dye colours. ‘You tell colour by smell, put away the notebook’, he says. Yet, in Salim’s pocket is a strip of paper that can measure the pH value of a solution; ‘Checking the Indigo vat with a pH paper helps me to get a general idea of how alkaline the vat is, before I start using my nose,’ he says. He is meticulous in checking the vats every morning and evening. ‘Yellappa is a master, [the 80 year old Indigo dyer who taught Salim] he doesn’t need the paper’, he says, a little enviously, ‘he can count on his nose to tell him when the vat is ready’. We decide to leave out the recipe for Indigo from the booklet, learning to tell colour and alkalinity by smell has to be learned from the master, not with recipes.

Salim setting up the Indigo vats in his dyehouse © Moody Chetanand

Ten years on, it is 2012, and I am theorising innovation in craft practices, as part of my PhD study –analysing the practices of dyers as socio-technical expertise. I am assailed by the smell of fermenting Indigo, as I enter the well functioning Indigo dyehouse for an interview with Salim the master dyer. Salim is a tad more portly, and is surrounded by a bevy of young men and women dyeing Indigo. ‘Come to learn Indigo dyeing?’ he asks with a smile. I take out my laptop, ‘put your hand in’ he says instead, ‘and turn the yarn 50 times’. I wet the hank of cotton yarn, and sit down amongst the other dyers. Unpractised as I am, I lose count after 37, but Salim tells me when I can stop, he can see when the colour is right.  Do you keep count? I ask the girl sitting next to me, curiously. ‘I used to’ she says, ‘now my body knows how long it takes, so the numbers disappear from my mind’.

Indigo dyeing: Dyehouse of Salim © Moody Chetanand

I reflect later, on how to write the recipe for Salim’s Indigo, and who to write it for. The underlying chemical principles of the traditional fermentation Indigo vat have been written up extensively by scholars and scientists. The aim of my own analysis was to establish that Salim like many other master dyers before and after him has indeed mastered the principles of Indigo dyeing. How does one establish that, without explicating his knowledge in scientific terms? Yet, even if I were to explicate such a recipe, Salim himself would not use it. Rather, he engages his material knowledge of Indigo as he problem solves, or sets up a new vat, or uses new materials to bring forth a resplendent blue time after time.

Where then does the knowledge of the underlying principle reside in his practice? I do not yet have an answer. All I can speculate is that the knowledge of the principles governing Indigo are known by Salim much like the numbers themselves are known in the dyeing: when dyers learn to count on their bodies, the numbers on the piece of paper disappear. Much like a weft thread woven through the warp, sometimes visible on the surface of the fabric, and at other times stabilised below the threads, Salim’s knowledge too is always present, sometimes visible and enumerable, and at other times invisible and embodied.

Annapurna Mamidipudi was trained as an engineer in electronics and communications, in Manipal, in South India. She had set up and worked for over 15 years in an NGO that supported vulnerable craft livelihoods where before completing her doctoral thesis titled “Towards a theory of innovation for handloom weaving in India” in the University of Maastricht in 2016. She is currently a visiting post doctoral fellow at the Max Planck Institute for the History of Science. She is a member of the NGO Timbaktu Collective’s executive committee, which works in the drought prone district of Anantapur in Andhra Pradesh to support women farmers and trustee of the Handloom Futures Trust, in Hyderabad.

The devil is in the details: turpentine varnish

Corrosion cast of bronchi and trachea, possibly from a rabbit, sheep, or dog, 1880-1890
Likely prepared by Harvard anatomist Samuel J. Mixter.
The Warren Anatomical Museum in the Francis A. Countway Library of Medicine

By Marieke Hendriksen

One of the first things you learn when you do reconstruction research is that the tiniest detail can make a difference.

Recently, I wanted to prepare an injection wax for corrosion preparations according to a 1790 recipe. Corrosion preparations are anatomical preparations created by injecting an organ with a fluid coloured wax that hardens. The organ is then lowered into a container with a corrosive substance, such as a hydrochloric acid solution, which corrodes the tissue, leaving a negative image of the veins and arteries of the organ. These preparations were made from at least the mid-eighteenth century, but because of their fragility, very few remain. As they were supposedly difficult to make, corrosion preparations were not only a way of studying anatomy, but also a tool for self-fashioning and establishing one’s status as an anatomist.

I have tried to create an injected preparation in the past.[1]It was my first attempt at reconstruction research ever, and although it served me well at the time, now I do things differently.

Most importantly, I want to stay much closer to the original recipe if possible. When we made the injected preparations in 2012, we used modern substitutes for some historical ingredients for economic reasons, and we did not have the time to study every ingredient in detail, substituting those we could not find directly with something we thought would have pretty much the same effect.

The recipe I want to use, Thomas Pole’s 1790 instruction for making a corrosion preparation, calls for a coarse red wax, made from fifteen ounces of yellow bees wax, eight ounces of white resin, six ounces of turpentine varnish, and three ounces of vermillion or carmine red.[2]The wax, resin, and pigment are fairly straightforward.

What is turpentine varnish though? Back in 2012, we ended up using just turpentine rather than turpentine varnish, and although those injections were not meant to be corroded, we ran into numerous problems. For example, it turned out to be almost impossible to keep the wax and the organs at a temperature at which we could both handle it and have it fluid enough to inject. It made me wonder whether sticking with the original recipe could solve that problem, so I set out to recreate it.

This turned out to be more complicated than expected, as there is not one standard recipe for turpentine varnish. Eventually I found a Dutch recipe from 1832 listing a turpentine varnish to finish display cabinets for natural history collections.[3] The ingredients are a pound of oil of turpentine, 8 ‘loot’ (a loot being 1/32 Dutch pound) of white resin, four loot of Venice turpentine, and ½ loot of aloe or kolokwint. Raw larch turpentine has a high concentration of volatile oils that can be distilled. The fluid part is known as oil of turpentine, whereas the residue left in the retort is usually called resin, rosin, or colophony. Oil of turpentine is the essential oil that remains after distilling raw larch turpentine. Venice turpentine is a thick, viscous exudation from the Austrian larch tree, which is not used as a varnish on its own as it becomes dark and brittle when exposed to oxygen and light. Aloe vera is widely known; kolokwint (the Dutch name for Citrullus colocynthisor bitter apple) less so. It is a plant with yellow fruits that resemble small pumpkins, which are very bitter and poisonous. That quality might explain its presence in a recipe for a varnish that is meant to ward off insects. Powdered aloe is readily available from artist’s material suppliers, so I went with that.

The varnish after 10 hours in the sun. The Aloe is the clearly visible murkiness on the bottom. Photograph: author.

The preparation of the varnish was pretty straightforward: put all ingredients in a bottle, cover, and leave in the sun for a day. The only problem was that I had to wait a week for a sunny day. When it came, I put in the ingredients and just left the bottle out in the sun for a couple of hours, which allowed me to stir the ingredients together. The aloe however did not resolve properly, and just sits at the bottom of the jar. While this might not be much of a problem when the varnish is applied to a cabinet, it makes this particular turpentine varnish unsuitable for use in my injection wax. Next time, I will make another batch without aloe and use that instead.

Why do I recount this–admittedly not very exciting–story? It shows how difficult it can be to follow a historical recipe to the letter. It also shows how much you learn from reconstruction research, even if it does not always yield the results you’d like, or as fast as you’d like.

[1]Marieke Hendriksen, Elegant Anatomy, (Leiden: Brill 2015), pp. 1-9.

[2]Thomas Pole, The Anatomical Instructor ; or an Illustration of the Modern and Most Approved Methods of Preparing and Preserving the Different Parts of the Human Body and of Quadrupeds by Injection, Corrosion, Maceration, Distention, Articulation, Modelling, &C(London: Couchman & Fry, 1790), pp. 21-5, 122-42.

[3] S. de Grebber, Over de schadelijke huisinsekten, als de huisvliegen, wespen, muggen, weegluizen, vlooijen, luizen, motten, pels-, boek- en kruidkevers en wormen, hout-, blad- en schildluizen, plantmijten enz., met aanwijzing van voldoende en proefhoudende middelen, om dezelve geheel uit te roeijen, Volume 1,(Amsterdam, 1832), pp. 52-3.