Category Archives: History of Science

Flower Atlas

This beautiful flower arrangement I stumbled upon today has got to be the world’s most colourful interpretation of the Atlas myth.

Flower arrangement representing Atlas. By Sandy Hine and Anne Harman (Photo: Tim Jones)
Flower arrangement representing Atlas. By Sandy Hine and Anne Harman (Photo: Tim Jones)

In Greek mythology, the punishment meted out by Zeus to Atlas for his siding with the Titans against the Olympians was to carry the heavens on his shoulders for all time.

Atlas at the Rockefeller Centre (Wikipedia)

We’re familar with the statues of muscular bearded guys kneeling under spheres – sometimes with the earth substituted for the heavens.  And in her book and film Longitude, author Dava Sobel tells how as a child she was inspired by the Atlas statue outside New York’s Rockefeller Centre.

The Atlas arrangement by Sandy Hine and Anne Harman is one of many on display under the theme Myths & Legends at the annual Florimania exhibition running 1-3 April at Hampton Court.

Thomas Huxley and the Return of the Rattlesnake Bones

The Guardian this week reported on the UK Natural History Museum’s efforts to repatriate a collection of  human bones, acquired by explorers in bygone years, to their original home with islanders in the Torres Straits.

Outrigger sailing canoe alongside "The Rattlesnake" (Fronticepiece to T.H. Huxley's Diary of the Voyagfe of H.M.S.Rattlesnake)
Outrigger sailing canoe alongside "The Rattlesnake" in the Louisiade Archipelago (Fronticepiece to T.H. Huxley's Diary of the Voyage of H.M.S.Rattlesnake)

It’s not a piece I’d linger over save for the mention of H.M.S. Rattlesnake, a 19th century survey ship involved in, among other duties, the collection of anthropological specimens.   Moreover, the Assistant-Surgeon on the 1846-50 voyage was the young Thomas Henry Huxley, very much cutting his teeth in hands-on nature study and ethnography.

Self-Portrait, Thomas Huxley on H.M.S. Rattlesnake (Huxley's Rattlesnake diary)
Self-Portrait, Thomas Huxley on H.M.S. Rattlesnake (Huxley's Rattlesnake diary)

Regular readers will know I’m quite a fan of the man later known as ‘Darwin’s Bulldog’, so any association with what we now recognise as unsavoury cultural violations demands a look-see.

Huxley worked alongside ship’s Surgeon Dr Thompson and Naturalist John MacGillivray, under the overall command of Captain Owen Stanley.

His Rattlesnake Diary, only published in 1935 by grandson Julian, captures thoughts and details of the voyage with a candour absent from more official reports.

The two diary entries that mention human artifacts, in this case a jaw bone bracelet, give some feel for the circumstances in which such pieces were obtained and the way Huxley spoke  about the indigenous peoples.

And as we have Julian Huxley’s thoughts on his grandfather’s behaviour (via his editorial commentary), there’s an opportunity to compare the ethics and cultural norms in anthropology not only between the mid-nineteenth century (when the bones were collected) and the present day (manifest in the Natural History Museum’s repatriation efforts), but also with the norms prevailing in 1935.

Human Jaw Bracelet (MacGillivray, Narrative of the Voyage of the Rattlesnake)
Human Jaw Bracelet (MacGillivray, Narrative of the Voyage of the Rattlesnake)

On to the diary entries.  In June 1849, with the Rattlesnake anchored among the islands of the Louisade Archipelago, Huxley describes an apparent overnight change in the local people’s willingness to barter a jaw bone ornament:

24th. Sunday [June 1849]

Huxley: “We had four or five canoes off to barter with us this morning – such squealing and shouting and laughing and yelling was never heard!  One of the niggers had a human jaw by way of a bracelet.  There was one tooth in the jaw and the circlet was completed by a smal bone apparently of some animal lashed to the coronoid process.

The old fellow would not part from it for love or money.  Hatchets, looking-glasses, handkerchiefs, all were spurned and he seemed to think our attempts to get it rather absurd, turning to his fellows and jabbering, whereupon they all set up a great clamour, and laughed.  Another jaw was seen soon in one of the canoes, so that it is possibly the custom there to ornament themselves with the memorials of friends or trophies of vanquished foes.” [Entry continues.]

Things have changed by the next day.  Huxley doesn’t mention any additional enticements that might have been used to achieve this, although it’s clear from other parts of the diary that iron and tools were particularly valued:

25th. [Monday, June 1849]

Huxley: “Several canoes came off this morning; one of them brought the figure-head which was so much wanted yesterday, and bartered it immediately.  In one of the canoes was a man with a jaw bracelet.  The jaw was in fine preservation and evidently belonged to a young person, every tooth being entire.  They seemed to have no scruple in selling it.  A jade hatchet was procured from them also.” [Entry continues.]

H.M.S. Rattlesnake

The jaw is also mentioned in a more formal report by MacGillivray in his Narrative of The Voyage of H.M.S.Rattlesnake (2) (And from which the drawing of the jaw bone above is taken.)

MacGillivray: “…But the most curious bracelet, and by no means an uncommon one, is that made of a lower human jaw with one or more collar bones closing the upper side crossing from one angle to another.  Whether these are the jaws of former friends or enemies we had no means of ascertaining; no great value appeared to be attached to them; and it was observed, as a curious circumstance, that none of these jaws had the teeth discoloured by the practice of betel chewing.”

First off, Huxley’s vernacular is alarming to modern ears – and this from a bastion of 19th century intellectual enlightenment.  Likewise, we wouldn’t by present standards in these circumstances take a willingness to hand over cultural artifacts as ethical licence to receive them.

Moving to Julian Huxley’s editorial.  Introducing a chapter titled “Huxley and the Savages”,  J.H. appears to be at pains to rationalise, if not apologise for, certain of T.H.’s behaviours, in doing so revealing his own predudices:

“He had none of the trained anthropologist’s insight into the black man’s mind, little conception of the alien ways of thought and feeling in which a primitive savage is enmeshed.  His reactions were those of a generous-minded young man with plenty of common sense but a strong feeling for justice.  He felt that there was some absolute standard of moral behaviour by which both the explorers and the natives could and should be judged.  On the whole, he censured his white companions more hardly than  the Papuans and Australian blacks.”

Although his views changed radically in later life, there’s a consistency here with Julian Huxley’s advocacy for Eugenic principles, a belief in the genetic basis for differences between human groups, and the concept of genetic inferiority.  I read the passage as an oblique approval of T.H.’s egalitarian sense of justice, but with the suggestion he’s applied it through ignorance and an incorrect assumption that blacks and whites are fundamentally the same.  One wonders what T.H. would say, had he the benefit of a time machine, in 1935?  Would he ask his grandson, politely, to stay off his team?

Thomas Huxley
Julian Huxley

From this example, it does start to look in some important respects like cultural attitudes in 1935 hadn’t progressed as much as one might think from those of Victorian times.  And were museums still accepting human artifacts in 1935? (I suspect they were, but please speak up if you know).  I doubt there was much repatriation of bones going on.

Well, that turned into something of a Huxley-bashing session afterall.   In fairness, isolated diary extracts don’t  give the most rounded impression of a person and, as I actually think the Rattlesnake diary does a particulary good job of that for Huxley, I’ll close by encouraging you to make a full reading (it’s not too long, very readable, and not at all boring).

Update 13.3.11Natural History Museum news release on the Torres Strait repatriation (10.3.11)

Update 6.5.11 Torres Strait Island Community ancestral remains return begins and video

Update 23.11.11 Museum Returns 19 Ancestral Remains to Torres Straits Islanders (Natural History Museum)

 

Sources

(1) T.H.Huxley’s Diary of the Voyage of H.M.S. Rattlesnake. Ed. Julian Huxley, Chatto and Windus, London 1935

(2) Narrative of the voyage of H.M.S. Rattlesnake, commanded by the late Captain Owen Stanley during the years 1846-50

John MacGillivray, George Busk, Robert Gordon Latham, Edward Forbes, Adam White – 1852

(3) The Huxley File, Guide 2, Voyage of the Rattlesnake. Charles Blinderman, Clark University.

(4)  Natural History Museum returns bones of 138 Torres Strait Islanders. Guardian newspaper, 10th March, 2011

 

Also of interest: Julian Huxley and the Invention of the Public Scientist (BBC Radio 4)

 

Photographs are taken from the author’s copy of T.H.Huxley’s Rattlesnake Diary and public domain sources.

Humphry Davy – Finding Love in the Colourful Age of Romantic Science

You’re a young 33, with an already impressive scientific career under your belt, and – although you only suspect it – a spectacular future ahead of you. Within 10 years, you’ll be elected President of the Royal Society.

But in November 1811, you’ve got something else on your mind.

How exactly would Humphry Davy (he of Davy Lamp fame among many other achievements) impress the first true love of his life – the beautiful widow and heiress Jane Apreece ?

Well, as it turned out……with more science of course.  And unlikely as it might seem, with quotes from the book whose spine forms the header of this very blog: Erasmus Darwin’s Zoonomia. (Erasmus was Charles Darwin’s grandfather….how many times)

Over to you, Humph….

‘There is a law of sensation which may be called the law of continuity & contrast of which you may read in Darwin’s Zoonomia [sic].  An example is – look long on a spot of pink, & close your eyes, the impression will continue for some time & will then be succeeded by a green light.  For some days after I quitted you I had the pink light in my eyes & the rosy feelings in my heart, but now the green hue & feelings – not of jealousy – but of regret are come.’

Smooth, or what?

I’m not the first to spot Davy’s creative application of ground-breaking ideas in colour perception; the above passage is from Richard Holmes’s award-winning Age of Wonder.  But what’s it all about?   Let’s start with Zoonomia.

Erasmus describes his experiments on colour and the eye in Volume I, Section III: Motions of the Retina; and Section XI: Ocular Spectra.

In his letter to Jane Apreece, Davy is referring to this experiment (Warning for the unfamiliar: f = s):

Zoonomia Vol1 Section III, p.20

Later, Erasmus restates the experiment and proposes a mechanism for the observed effect:

Zoonomia Vol1 Section III
Red Spot (Zoonomia V1 S.III p.14)

Darwin’s experiments covered a range of colour and contrast effects.  Here in his ‘tadpole’ experiment he interprets the bright after-image  we see after staring at a dark object, explained again in terms of conditioning and sensitivity of the retina.


Erasmus’s ‘tadpole’ (a little smudged after 200 years)

The drawings in Zoonomia are individually hand drawn and hand coloured.  In this passage, Erasmus encourages his readers to partake of some drawing-room diversion using silks of many colours:

Erasmus encourages his readers to lay down silks
Readers are encourgaged to lay down coloured silks

All exciting stuff, not least for Erasmus, who betrays his giddiness in this chuckling wind up to his analysis, where he curries favour with the incumbent president of the Royal Society, Sir Joseph Banks.

Joseph BanksI was surprised, and agreeably amused, with the following experiment.  I covered a paper about four inches square with yellow, and with a pen filled with a blue colour wrote upon the middle of it the word BANKS in capitals, and sitting with my back to the sun, fixed my eyes for a minute exactly on the centre of the letter N in the middle of the word;after closing my eyes, and shading them somewhat with my hand, the word was dinstinctly seen in the spectrum in yellow letters on a blue field; and then, on opening my eyes on a yellowish wall at twenty feet distance, the magnified name of BANKS appeared written on the wall in golden characters.” [Banks was elected President of the Royal Society in 1778].

Erasmus saw Banks’s name in large golden letters on his garden wall

Did Erasmus get it right with all that stuff about flexing of the antagonist fibres and analogy to the muscles? Well, he wasn’t a million miles away from the truth.   Indeed, it looks like yet another case of Erasmus Darwin not getting the credit he deserves for being ahead of the game.

Here’s a modern popular version of the tadpole ‘trick’ (Credit: from here)

The idea is you stare at the bulb for 20 or 30 seconds then look at the white space to the right of it.  The popular description of the effect is in terms of  the retina cells stimulated by the light portions of the image being desensitized more than those which respond to the dark part of the image – so that the least depleted cells react more strongly when the eye switches to the more uniform all-white image next to the bulb.

Davy Lamp (Wiki Commons)

The modern authors note also that the size of the afterimage varies directly with the distance of the surface on which it is viewed: a manifestation of Emmert’s Law.  This is consistent with Erasmus’s report of the name BANKS writ large on his garden wall.

Likewise, the modern interpretation of colour afterimages is popularly framed in terms of how ‘fatigued’ cells respond to light (See how fatigued’ aligns with Erasmus’s muscular references).  Erasmus didn’t know we have two types of light-sensitive cells in the eye: cones (that broadly speaking detect colour) and rods (that are more sensitive to absolute brightness), and that the cones themselves are sub-divided to be maximally sensitive to red , blue and green (RGB).

But he did understand the concept of complementary colours, and recognised that whatever part of the retina detects the colour red becomes fatigued through over-exposure; he’d got the principle that green appears againt white as a kind of negative red ).

If we dig a little deeper we find the brain-proper conspires with the retina to consider what we see in terms of black-white, red-green, and blue-yellow opponencies.  And the corresponding three sets of retinal cells operate in a pretty arithmetical fashion: the electrical impulse sent to the brain by the red-green cells is proportional to the net red-green exposure to light that the cell has experienced in recent time; likewise the blue-yellow sensitive cells.

That’s all clear then.

What bugs me a wee bit is that in my research for this post I never once saw a reference to Erasmus Darwin.  Rather, the standard historical reference seems to be the German psychologist Ewald Hering (1834-1919), who is credited with the first observations of the phenomenon.

Hold the horses – it’s Valentines Day

Ok, we got a bit lost in the science there.  And I got a bit hot under the collar; eh-hem.   So, the real question is: did Davy’s colourful overtures hit the mark?  Well, sort of.  Humphry Davy and Jane Apreece married the following year in 1812.  The bad news is it didn’t really work out longterm.

All the same, Davy shone ever bright in his science.  Already famous for discovering a whole range of new chemical elements, including via separation by electrolysis potassium and sodium, and chlorine gas; he went on to discover elemental iodine and, for good measure, invented the Davy Lamp – thereby saving who knows how many thousands of lives in the mining indistry.   In 1820, when Banks’s death ended his 40+ year run at the head of the Royal Society, Davy was elected President.

All of which doubtless kept a bit of colour in his cheeks.

Shop-front in Penzance where Davy served his early apprenticeship (Tks S.Klinge)

Sources

Darwin, Erasmus. Zoonomia Vol 1 Pub. J.Johnson 1796 (photos are from author’s copy)

Holmes, Richard. Age of Wonder. Pub. Harper Press (the softback is out for about £7 now – buy it!)

And Resources

The Guttenburg version of Zoonomia Vol 1 is here.

 


Buon Compleanno Galileo – “Eppur si muove”

“And yet it moves” – supposedly the rider Galileo Galilei added to his confession to the Inquisition when questioned about the earth’s movement around the sun.

And clock hands move too – across timezones.  That makes it comfortably still 15th February in my equal most favouritistical country, the USA –  so,  HAPPY BIRTHDAY GALILEO!

To tell you all about him:  heeeeeeeere’s Carl…..

Fine Words

In dusting down an old review magazine from my former school, I couldn’t help but notice a similarity, in tone and content, between the mission statement from one of the more formatively influential past headmasters, and some of my favourite lines from Thomas Huxley. As to which of these inspired me the most, or whether the ethos of the one led to a later empathy with the other – I cannot say. Both statements follow. In each case you will have to forgive the sexism; Huxley was a man of the Victorian Age, and Frazer was the headmaster of what was at the time an all boys school. Anyhow, not much evidence for ‘two cultures’ here. Both are worthy sentiments – enjoy !

Huxley first….

Thomas Huxley
Thomas Huxley

“That man, I think, has had a liberal education who has been so trained in youth that his body is the ready servant of his will, and does with ease and pleasure all the work that, as a mechanism, it is capable of; whose intellect is a cold, clear, logic engine, with all its parts of equal strength, and in smooth working order; ready like a steam engine, to be turned to any kind of work, and spin the gosamers as well as forge the anchors of the mind; whose mind is stored with knowledge of the great and fundamental truths of Nature, and of the laws of her operations; and who, no stunted ascetic, is full of life and fire, but whose passions are trained to come to heel by a vigorous will, the servant of a tender conscience; who has learned to love all beauty, whether of nature or of art, to hate all vileness, and to respect others as himself.”

Thomas Henry Huxley

Dr H.Frazer
Dr H.Frazer

“A school in the twentieth century must try to educate the hands and senses as well as the mind; it will do each separate task the better for attempting all three. It will teach its pupil to create as well as to criticise, by giving him the chance to create in a variety of ways, so that he can find his own particular medium while to some extent sharing the experience of artists and craftsmen of all kinds. It will teach him to find out for himself, as well as to absorb the findings of others. It will try to produce men who may earn a living as scholars or scientists or technologists or craftsmen or artists, but who are to a varying extent all of these at once, and gentlemen too. Thus only can we produce the all-round men we need if the next age is to be one of high civilisation as well as of great prosperity.”

Dr H. Frazer

ALSO OF INTEREST ON THIS BLOG?

– Happy Birthday Thomas Henry Huxley

Thomas Huxley and the Return of the Rattlesnake Bones