About felicityhen

I am a historian of science, particularly interested in early-modern intellectual history and the social world of the early Royal Society of London. I am currently editing Robert Hooke's diary for publication.

A week in the life of Robert Hooke: Sunday 30 March to Saturday 5 April 1673

The weather this week in 1673 was about the same as the weather in 2013 – terrible. Hooke reported cold, rain, frost, and snow during the week. The worst day was 3 April:

a continual snow from 6 in ye morn till late at night when ye wind rose stormy in ye north. Th[ermometer] all day 2. The like day not knowne for cold & snow.

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A week in the life of Robert Hooke: Sunday 23 March to Saturday 29 March 1673

Hooke’s feverish illness continued this week – if you’ve been following his tweets on @hookeslondon you’re probably finding his complaints a bit tedious but don’t worry I’m sure he’ll perk up again soon. And haven’t we all had the same experience of getting our hair cut, failing to put on a warmer cap, and getting a cold head? Sadly in this case ‘upon keeping my head warmer my head recouered [but] my losse of smell was rather worse & my ill tast [ie. in his mouth] continued.’ You always know things are bad with Hooke when he starts writing in Latin: and he followed this with ‘alia tentanda est via. Deus prosperat’. My Latin is a bit rusty but this seems to translate as ‘another way must be tried. God prospers’ – which suggests that this time Hooke was looking on the bright side and reminding himself that God helps those who help themselves.

Despite his various maladies Hooke soldiered on and pursued his experiment on ‘penetration’ – this was the mixing of spirit or oil of vitriol (sulphuric acid) and water that the Royal Society had requested last week. Hooke performed this experiment a couple of times at home before demonstrating it at the Royal Society’s meeting and reading a lecture about it. The Society’s minutes of this meeting record:

The Curator [ie. Hooke] made an Experiment of mingling Oyle of Vitriol and Common water together, thereby shewing, that these two Liquors were so incorporated, by entring into the pores of one another, that they took up lesse room when mingled together, than they did both being a-part.

This seems a little bit unlikely to me – but my chemistry is even worse than my Latin. Perhaps any chemists reading this might like to comment . . ?

At the same Royal Society meeting, the Italian/French astronomer Giovanni Domenico Cassini’s discovery of two of Saturn’s moons was announced and his book presented to the Society for their library. Hooke’s note that ‘Old[enburg] kept ye book’ could be read (more generously) as a reminder to himself, because he was the Society’s librarian and was meant to keep track of these things, or (less generously) as a note to check up on whether Oldenburg was keeping books actually meant as gifts for the Society. Hooke himself ‘deliverd Rhedis and Marchetti Books’ back to the Society – these were works by the Italian philosophers Francesco Redi and Alessandro Marchetti. Just for the record, all three volumes are still in the Society’s collection, so we shouldn’t accuse either Hooke or Oldenburg of neglecting their duty to the Library.

Hooke was also busy as usual with City business. He attended the Commissioners of Sewers at the Guildhall on Monday 24th, and on Thursday he took a ‘view at fleet Ditch’ and ‘set out Oliver & Avis’. The river Fleet, which rises on Hampstead Heath and flows (now underground) to the Thames, had by this time become clogged with silt and rubbish and Hooke’s post-fire project was intended to return it to a navigable state up to Holburn Bridge. The vision was grand – installation of new quays and warehouses along a newly-dug canal. Hooke, Wren and others spent a long time on this expensive and complex endeavour, and Thursday’s ‘view’ may have been something to do with the construction work, as John Oliver was another surveyor and Avis was a master builder. The Fleet Canal was finally completed in autumn 1674, but the problems of silting and illegal dumping of rubbish and (apparently) dead dogs did not go away, and it was eventually covered over in the 18th century.

That’s all for now, but tune in next week for all the news about a snowy start to April 1673, and an eventful chemical demonstration at the Royal Society!

And if you want to find out more, I suggest the following:

The article in the Philosophical Transactions announcing Cassini’s discovery of ‘two New Planets about Saturn’ (Philosophical Transactions vol. 8 (1673), pp. 5178-5185)

Restoration Reading #1: ‘Micrographia’ by Robert Hooke (London, 1665)

Unless you’re lucky enough to be an academic or a rare books librarian you probably don’t get much opportunity to read copies of the books Hooke had in his library. Hooke was an avid reader and buyer (and browser, borrower, exchanger, discusser) of books, and given they formed such an important part of his intellectual and social life I thought it would be fun to delve a little deeper and find out what was on the shelves in Hooke’s library . . . so I’m starting a series of ‘Restoration Reads’, which will be book descriptions rather than book reviews as such. (If it was good enough for Hooke it’s good enough for me.)

I’m starting with Micrographia because it’s one of my favourite Restoration books and of course it was written by one of my favourite Restoration gentlemen. It’s also extremely important, because it was the first fully illustrated book of microscopy. The illustrations are one of the main attractions of the book – fantastically detailed and beautifully executed, they still have the same power to impress today as they must have done almost three hundred and fifty years ago. Imagine folding out the super-sized plate with the image of the flea, and seeing for the first time those powerful legs, armour-plated body and hooked claws. Samuel Pepys famously sat up until 2am reading Micrographia, and described it in his diary as ‘the most ingenious book that ever I read in my life’. It was probably the pictures that prompted Pepys to buy the book in the first place: he saw a copy at his bookseller’s and found it ‘so pretty that I presently bespoke it’.

I suspect we have Charles II to thank in some measure for the high-quality engravings. It was he who requested an illustrated book of microscopy, initially from Christopher Wren, who had begun making such drawings at Oxford. He had presented some to Charles, who liked them so much he asked the Royal Society for more. Wren was busy with other projects and the job fell to Hooke to complete. I particularly like the point he makes with his first plate of observations.

Magnified needle-tip, printed full-stop and razor's edge from Hooke's Micrographia (London, 1665).

Needle tip, printed full-stop and razor’s edge, in Robert Hooke’s Micrographia (London, 1665). Copyright The Royal Society (used with permission).

Here Hooke starts at the very beginning, with the two basic geometric units, the point and the line. But because he’s doing microscopy rather than geometry, the point is illustrated by the tip of a needle (top image above) and a printed full-stop (central image), and the line is the edge of a razor (bottom image). Hooke’s purpose in this plate is to demonstrate to his readers the microscopic irregularities in things the human eye perceives as regular, sharp, and smooth. So the tip of the needle is rounded and blunt, the razor’s edge pitted and scarred, and the full-stop is a chaotic blot ‘like a great splatch of London dirt’. According to Hooke, it’s tedious to look at man-made things through the microscope, because they all turn out to be the same – gross, clumsy and irregular. In his own words: ‘the Productions of art are such rude mis-shapen things, that when view’d with a Microscope, there is little else observable, but their deformity’.

So he turns to the natural world, and everywhere he looks he sees things that are perfectly formed and perfectly suited to their purpose. ‘In natural forms, there are some so small, and so curious, and their design’d business so far remov’d beyond the reach of our sight, that the more we magnify the object, the more excellencies and mysteries do appear’. One of the reasons Micrographia was so influential was that Hooke wasn’t content just to look at the forms of natural objects and draw them; he wanted to understand their ‘design’d business’ – that is, why they were formed in that way, and what effect it had. One of Micrographia‘s claims to fame is that Hooke used the word ‘cell’ here for the first time to describe the tiny pores he observed in a slice of cork and in the pith of other plants. He compared them with the cells in honeycomb. As soon as he saw them, said Hooke, he realised they explained ‘all the phenomena of Cork’: that is, its exceeding lightness, its ‘springiness and swelling nature’, and its imperviousness to air and water.

He went on to describe and explain the microscopic forms of dozens of other everyday plant and insect specimens, including mould, stinging nettles, spiders, ants, mites, flies, poppy-seeds, fish scales, feathers, hair, petrified wood, and ‘the Eels in Vinegar’ (nematode worms). His observations and descriptions are really interesting (but much too long to reproduce here) so I encourage you to read some of them yourselves, in one of the online editions of the book. Hooke’s text is extremely lively and readable, and you get a good impression of the man behind the microscope.

Partly, this is because Hooke takes the time to explain some of the difficulties he encountered while doing his observations. The ant, he says, was ‘a creature, more troublesom to be drawn, then any of the rest’ because it would not lie still: ‘whilst it was alive, if its feet were fetter’d in Wax or Glew, it would so twist and wind its body, that I could not any wayes get a good view of it; and if I killed it, its body was so little, that I did often spoile the shape of it’. Hooke’s solution was to drop it in alcohol, which stunned it for about an hour; until ‘upon a sudden, as if it had been awaken out of a drunken sleep, it suddenly reviv’d and ran away’.

Hooke also commented on the difficulty in correctly interpreting what he could see – the same object looked very different in different lights. ‘For it is exceeding difficult in some Objects, to distinguish between a prominency and a depression, between a shadow and a black stain, or a reflection and a whiteness in the colour. . . . The Eyes of a Fly in one kind of light appear almost like a Lattice, drilld through with abundance of small holes . . . In the sunshine they look like a Surface cover’d with golden Nails; in another posture, like a Surface cover’d with Pyramids; in another with Cones’.

I love the way Hooke uses a rich vocabulary of descriptive language to complement his illustrations. I think he really wanted his readers to experience for themselves the beauty  and complexity in the microscopic details of ordinary things. As he says in his preface, the microscope (and the telescope) allow us to discover completely new worlds, previously unimagined – and Micrographia does a great job of conveying Hooke’s excitement and wonder as he voyaged into the unknown.

A week in the life of Robert Hooke: Sunday 16th to Saturday 22nd March 1673

Hooke’s London was experiencing typical spring weather in mid-March 1673: that is to say, a mixture of sun, rain, wind, and clear skies (but no snow, unlike mid-March 2013). Hooke’s weather record for 18 March gives a good feel for this: ‘cleer for ye most part all day but some flying great clouds sometimes intercepted ye Sun’. Despite the generally good weather, Hooke wasn’t feeling entirely well, suffering from feverish symptoms. He felt ‘Guiddy’ on the 18th, for which he took Elixir proprietatis (a well-known medicine made of aloes, myrrh and saffron that was apparently still in use in the 20th century!). On the 19th he ‘went shivering and hazy like an ague to bed burnd about 2 [am?] & sweat much after’. From his diary entry it sounds as though this had resulted from taking Dulwich water (ie. mineral-water from Dulwich), and a ‘spoonful of Andrews’ (possibly spirit of angelica) – but he may have taken these because he was already feeling ill. It’s difficult to say whether cutting his hair ‘short wth scizzers’ was a response to feeling feverish, or just routine maintenance – possibly the latter, given that he’d sent his periwig ‘to be curled’ the previous day. If you look at the portraits of some of Hooke’s Royal Society colleagues (Robert Boyle, for example) you’ll see how luxuriously curly their periwigs were.

The changeable weather and a slight indisposition didn’t slow Hooke down, and he recorded a busy week of work (with, of course, some visits to Garraway’s coffee house). In terms of official work for the City, he visited the Guildhall ‘commissioners’ on the 17th (possibly the Commissioners for Sewers?); produced a certificate for ‘Mr Calmedy’ (the results of his survey of a ground plot); and took a ‘view’ (that is, made a survey) in Queenstreet. The entry for 22nd March is intriguing: ‘at Guildhall wth townclark Gresham Writings Burnt’. Were these ‘Writings’ the records of Sir Thomas Gresham’s legacy? I’m not quite sure why Hooke would have been interested in this, except that about this time planning had begun for the Royal Society’s return to Gresham College, its original meeting-place. Since the Great Fire in 1666 the Society had been meeting at Arundel House on the Strand, so that Gresham College could be used as a temporary Royal Exchange. Could there have been some question as to whether the Royal Society should be allowed back? The only other evidence from Hooke’s diary comes a month later, in an entry for 23 April:
at Guildhall searcht ye Hustings book for Sr Th Greshams house. found he purchasd 2 houses in Broad Street. An[no] 10 Elizabethæ. & one in Bishopsgate Street. An[no] 3o Elizab[ethae] Quere
It’s not clear why Hooke looking into the affairs of Thomas Gresham, but another possibility is that it was linked with some work going on at or near Gresham College at this time. The entry for 18 March says that an unnamed ‘cornchandler broke downe part of Gresham Coll wall. promised inclosing house of office, and yard. made a chimny out of ye Room equall to my Repository’. This is a bit mysterious but perhaps had something to do with a neighbouring property. The ‘house of office’ was a common euphemism for the privy. I guess the room ‘equal to’ the Repository meant the room opposite or next to the Royal Society’s Repository (collection of museum artefacts).

Hooke’s scientific work this week involved a couple of experiments, a meeting of the Royal Society at Arundel House on Wednesday, and some manual work constructing scientific apparatus. The ‘experiment of burning’ had been ongoing since mid-February. The minutes of the Royal Society meeting on 19 February recorded a failed experiment ‘to find, whether the Air increases or decreases by burning’, and according to the minutes Hooke’s apparatus apparently let him down again on 5 March. Hooke himself was convinced that the air decreased with burning and read a lecture to the Society presenting these results on 19 March. Having successfully settled that question, he moved on to an experiment about ‘the penetration of spirit of Vitrioll & water’. Again, the Fellows were curious about whether the mixture of ‘Oyle of Vitriol’ (ie. sulphuric acid) and water would result in a larger or smaller volume than that of the separate liquids. (You’ll have to wait until next week for the results!) The Royal Society also received Dutch microscopist and biologist Jan Swammerdam’s ‘cutts of a frogs Lungs’ – that is, drawings of dissected lungs. They are still in the Society’s archive (along with Swammerdam’s drawing of a cute little rhinoceros beetle).

Drawing of frogs' lungs by Jan Swammerdam, 1673. Copyright The Royal Society.

Drawing of frogs’ lungs by Jan Swammerdam, 1673. Copyright The Royal Society.

Hooke seemingly also spent some time this week working on his ‘arithmetick engine’ or calculating machine. Gottfried Leibnitz FRS had shown such a device to the Royal Society earlier in the year, and Sir Samuel Morland FRS had also produced a working model (Hooke’s judgement? ‘very silly’). Hooke’s engine, of course, was intended to be more elegant and yet more powerful than either of these previous examples. It seems likely that the lathe he bought this week, and the ‘Engin for cutting wheels’ he borrowed from a Mr Bell, were connected with this project. On the 20th Hooke recorded that ‘Mr Stanton shewd me his module of Arithmetick engine’. This was presumably the model of Hooke’s design that he had requested from Stanton earlier in the month.

It was also a good week for books. Hooke borrowed the ‘Description of Ceylon’ from Mr Chamberlaine, which was possibly a Dutch work by Philippus Baldaeus. He also noted that he had seen a German book ‘of mineralls’ that belonged to Henry Oldenburg, the Royal Society’s secretary. He did make one purchase, a fascinating and very beautiful book called An embassy from the East-India Company of the United Provinces, to the Grand Tartar Cham Emperor of China (London, 1673), which he bought for twelve shillings. This was a translation by John Ogilby of a Dutch volume. I haven’t seen the Dutch edition, but the English translation was illustrated with lovely engravings showing details of Chinese life. You can see a digital version of the book here.

That’s all for this week – if you have any questions let me know and I’ll do my best to clarify.

And if you want to find out more, you might be interested in the following:
For more on 17th century medicines see this very interesting article about a medicine chest presented to a young Scottish nobleman by the Grand Duke of Tuscany.

For the minutes of the Royal Society meetings at this period see Thomas Birch’s The History of the Royal Society of London for Improving Natural Knowledge (London, 1756) – free online via Google Books.

To find out more about Hooke’s surveying activities, I recommend Michael Cooper’s ‘A More Beautiful City’: Robert Hooke and the rebuilding of London after the Great Fire (2003).

Sex and the single Restoration scientist

Those of you who are following the daily Twitter feed of Hooke’s diary may have found today’s tweet a little surprising. For those who aren’t following, the full entry reads:

Sun 2. morn cloudy & like to rain. W[ind] N[orth] brisk. Th[ermometer] 6. [mercury] 170. A[fternoon] W[ind] E[ast] strong. air cleer sun set behind a cloud. sky cleer blew but some high thin white cloudes moving from ye North at [sun] set. there appeard a great redness which by & by vanish but at 8°. 40′. the under sides of some Lower cloudes were intensly blood read. which was vanisht in 5 or 6 minutes.
Godfrey. cade walk. DH. drank milk very diuretick recouerd much. walkd. Garways. read de Aphthis. [ejaculation]. drank milk which began to agree very well & to remove ye ill tast.

The first part of the entry, obviously, is Hooke’s daily weather report. Incidentally this description of the clouds is quite interesting given Hooke’s scientific paper on naming cloud formations. The second part of the entry is all about Hooke’s day. It’s also fairly straightforward, if unexpectedly intimate.

Why would he record this ‘ejaculation’ in this way? In fact, the eagle-eyed reader will have spotted that the word ‘ejaculation’ is written in square brackets, meaning that it has been supplied by the editor (in this case me). What actually appears in the diary is a symbol that looks a bit like this .

This was interpreted by Hooke’s first editors in 1935 thus:
‘Pisces, the twelfth sign of the Zodiac. Used by Hooke to indicate orgasm, probably because of the association of Venus and Cupid in the legendary origin of the symbol.’

Obviously they didn’t decide that Hooke used the symbol to mean ‘orgasm’ from this entry alone, but from other entries where it appears in a context that more obviously suggests sexual activity (ie. there was a woman present). I’ve followed more recent scholars in using ‘ejaculation’ instead. Why make this change? To answer that, we need to think about why Hooke might have recorded his orgasm/ejaculation in his diary. In quite a few instances there was seemingly no-one else involved, so we can rule out things like recording sexual conquests, keeping a record in case someone got pregnant, and so on. In fact I think the answer that makes most sense is that Hooke was in this, as in all things, a scientist, and he was just doing what he always did, making observations. In this case the entity under observation was himself. As Diary followers have already seen, he recorded information about his own health regularly and a bit obsessively – but when you think about the Restoration medical facilities available (rudimentary at best), you can’t really blame him. He would certainly have been interested to see whether there were any patterns in whether he felt better or worse afterwards, or slept more or less soundly. So the word ‘ejaculation’, which has a slightly more clinical connotation than ‘orgasm’ seems to be more appropriate here. I’ve checked the Oxford English Dictionary and the word was indeed used in this sense in the seventeenth century, although another possibility might be ’emission’ which was also in use at the time. It would be very interesting to know of any other diarists from the same period who recorded their bodily functions in a similar way. I don’t know of any but if you do, please let me know.

Unfortunately I’m not going to get around to talking about sex so the title of this post is a bit misleading – sorry. I’ll do part two when Hooke starts sleeping with his housekeeper.

The resorts of idle and disaffected persons

On Thursday 30 December 1675, a startling proclamation was printed in the London Gazette:

Whereas it is most apparent, That the Multitude of Coffee-houses of late Years set up and kept within this Kingdom . . . and the great resort of Idle and Disaffected persons to them, have produced very evil and dangerous Effects, as well for that many Tradesmen and others do therein mispend much of their time, which might and probably would otherwise be employed in and about their lawful Callings and Affairs; but also, for that in such Houses, and by occasion of the meetings of such Persons therein, divers false, malitious and scandalous Reports are devised and spread abroad, to the Defamation of His Majesties Government, and to the Disturbance of the Peace and Quiet of the Realm; His Majesty hath thought it fit and necessary, That the said Coffee-houses be (for the future) Put down and Suppressed . . .
(read the whole proclamation on the London Gazette website)

There was a public uproar and he had to back down, but His Majesty Charles II did have a point. Anyone reading Hooke’s diary is under no illusions that a good deal of Hooke’s time that might otherwise have been spent doing who knows what, possibly one of his several lawful callings, was in fact employed in meeting friends at Garraway’s or Jonathan’s. Furthermore, every Restoration Londoner knew that the coffee-house was the place to go for false, malicious and scandalous reports (second only to the palace of Whitehall for really juicy gossip). Hooke probably didn’t go specifically for the scandal, although occasionally he ran across scandal in the course of a visit. He went to meet friends, talk to people, and read the latest news from home and abroad. Of course, the main topic of conversation on 30 December 1675 was the royal proclamation.

You could run into just about anyone at a coffee-house, from shoe-makers to courtiers. Hooke’s friends and associates had their own particular haunts – Hooke often visited Man’s with Sir Christopher Wren, and select Fellows of the Royal Society regularly adjourned to the Crown Tavern in Threadneedle Street after meetings. In the 1670s Hooke’s favored establishment was Garraway’s in Exchange Alley, run by Thomas Garraway; in the 1680s and 1690s he preferred Jonathan’s, kept by Jonathan Miles, again in Exchange Alley. Hooke sometimes visited Jonathan’s three times in a day, and usually met some of his particular friends there. He recorded such visits in a truncated fashion in his diary. Part of an entry for Thursday 17 January 1689 reads:

. . . at Jon Gof Lod Sp Wal: Hayn. Mev. Cur. Pag. of flood. Atlantis &c . . .
meaning ‘at Jonathans. [met] Godfrey, Lodwick, Spencer, Waller, Hains, Meverell, Currer, Paggin. [talk] of flood. Atlantis, &c’. The listing of names became almost compulsive for Hooke in the later part of his diary – this is a typical entry. On this occasion the talk turned to the Biblical flood and its consequences, something Hooke was particularly interested in at this time as part of his theorising about the history and formation of the earth. On other visits Hooke was more interested in reading the latest news printed in the London Gazette, or papers from Scotland, Ireland, Holland and Paris. It was at Jonathan’s that Hooke first learnt of the death of Queen Christina of Sweden (he noted this on Monday 18 March 1689, and again on Thursday 9 May, when the Paris Gazette apparently ran an obituary of the prominent monarch). Happenings closer to home were also discussed, including London mayoral elections and military affairs in Scotland and Ireland.

Just one contemporary drawing of the interior of a seventeenth-century coffee-house exists, now in the British Museum collections. (view it here) It’s just a watercolour sketch, but it gives a good impression of the tobacco pipes, coffee and conversation on offer – a convivial place to spend an evening with Hooke and his friends.