The Faber Book of Science

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The Faber Book of Science Page 45

by John Carey


  Transfused, the blood preserves its rose, though it is sick.

  Meters record the blood, measure heart-beats, control the breath.

  Hieratic gesture: scalpel bares a creamy rib; with pincer knives

  The bone quietly is clipped, and lifted out. Beneath,

  The pink, black-mottled lung like a revolted creature heaves,

  Collapses; as if by extra fingers is neatly held aside

  By two ordinary egg-beaters, kitchen tools that curve

  Like extraordinary hands. Heart, laid bare, silently beats. It can hide

  No longer yet is not revealed. – ‘A local anaesthetic in the cardiac nerve.’

  Now, in firm hands that quiver with a careful strength,

  Your knife feels through the heart’s transparent skin; at first,

  Inside the pericardium, slit down half its length,

  The heart, black-veined, swells like a fruit about to burst,

  But goes on beating, love’s poignant image bleeding at the dart

  Of a more grievous passion, as a bird, dreaming of flight, sleeps on

  Within its leafy cage. – ‘It generally upsets the heart

  A bit, though not unduly, when I make the first injection’.

  Still, still the patient sleeps, and still the speaking heart is dumb.

  The watchers breathe an air far sweeter, rarer than the room’s.

  The cold walls listen. Each in his own blood hears the drum

  She hears, tented in green, unfathomable calms.

  ‘I make a purse-string suture here, with a reserve

  Suture, which I must make first, and deeper,

  As a safeguard, should the other burst. In the cardiac nerve

  I inject again a local anaesthetic. Could we have fresh towels to cover

  All these adventitious ones. Now can you all see.

  When I put my finger inside the valve, there may be a lot

  Of blood, and it may come with quite a bang. But I let it flow,

  In case there are any clots, to give the heart a good clean-out.

  Now can you give me every bit of light you’ve got.’

  We stand on the benches, peering over his shoulder.

  The lamp’s intensest rays are concentrated on an inmost heart.

  Someone coughs, ‘If you have to cough, you will do it outside this theatre.’ – ‘Yes, sir.’

  ‘How’s she breathing, Doug.? Do you feel quite happy?’ – ‘Yes, fairly

  Happy.’ – ‘Now. I am putting my finger in the opening of the valve.

  I can only get the tip of my finger in. – It’s gradually

  Giving way. – I’m inside. – No clots. – I can feel the valve

  Breathing freely now around my finger, and the heart working.

  Not too much blood. It opened very nicely.

  I should say that anatomically speaking

  This is a perfect case. – Anatomically.

  For of course, anatomy is not physiology.’

  We find we breathe again, and hear the surgeon hum.

  Outside, in the street, a car starts up. The heart regularly

  Thunders. – ‘I do not stitch up the pericardium.

  It is not necessary.’ – For this is imagination’s other place,

  Where only necessary things are done, with the supreme and grave

  Dexterity that ignores technique; with proper grace

  Informing a correct compassion, that performs its love, and makes it live.

  A less reassuring poem, about an earlier stage in the history of surgery, is by the doctor-poet Dannie Abse:

  In the Theatre

  (A true incident)

  Only a local anaesthetic was given because of the blood pressure problem. The patient, thus, was fully awake throughout the operation. But in those days – in 1918, in Cardiff, when I was Lambert Rogers’ dresser – they could not locate a brain tumour with precision. Too much normal brain tissue was destroyed as the surgeon crudely searched for it, before he felt the resistance of it … all somewhat hit and miss. One operation I shall never forget …

  Dr Wilfred Abse

  Sister saying – ‘Soon you’ll be back in the ward,’

  sister thinking – ‘Only two more on the list,’

  the patient saying – ‘Thank you, I feel fine’;

  small voices, small lies, nothing untoward,

  though, soon, he would blink again and again

  because of the fingers of Lambert Rogers,

  rash as a blind man’s, inside his soft brain.

  If items of horror can make a man laugh

  then laugh at this: one hour later, the growth

  still undiscovered, ticking its own wild time;

  more brain mashed because of the probe’s braille path;

  Lambert Rogers desperate, fingering still;

  his dresser thinking, ‘Christ! Two more on the list,

  a cisternal puncture and a neural cyst.’

  Then, suddenly, the cracked record in the brain,

  a ventriloquist voice that cried, ‘You sod,

  leave my soul alone, leave my soul alone,’ –

  the patient’s dummy lips moving to that refrain,

  the patient’s eyes too wide. And, shocked,

  Lambert Rogers drawing out the probe

  with nurses, students, sister, petrified.

  ‘Leave my soul alone, leave my soul alone,’

  that voice so arctic and that cry so odd

  had nowhere else to go – till the antique

  gramophone wound down and the words began

  to blur and slow, ‘… leave … my… soul … alone …’

  to cease at last when something other died.

  And silence matched the silence under snow.

  Sources: James Kirkup, A Correct Compassion and Other Poems, London, Oxford University Press, 1952. Dannie Abse, Collected Poems, 1948–76, London, Hutchinson, 1977.

  Enter Love and Enter Death

  Joseph Wood Krutch (1893–1970) was both a distinguished literary scholar (he held Chairs of English and Drama at Columbia University) and the author of award-winning natural history books such as The Desert Year (1952) and The Best of Two Worlds (1953). The Volvox, the subject of this extract from The Great Chain of Life (1957), is a freshwater organism, visible to the naked eye as a green speck about the size of a pinhead. It is indeterminately both plant and animal: zoologists class it among protozoa, and botanists among algae. Its reproductive cells are differentiated from its other cells, a fact considered significant in tracing the evolution of higher animals from protozoa.

  On the second of January 1700 Anthony van Leeuwenhoek [see p. 28], draper of Delft and self-taught Columbus of the littlest world, was writing to the Royal Society of London one of the many letters in which he described his voyages of discovery within a drop of water.

  To William Dampier and other such rovers he left the exploration of the terrestrial globe. To another contemporary he left those equally adventurous voyages ‘through strange seas of thought, alone’ which took Newton across abysses of space to spheres much larger but not so little known as those to which Leeuwenhoek devoted his long life.

  These worlds of his were not lifeless but teeming with life; and his discoveries, unlike those of Columbus, were discoveries in an absolute sense. He saw what no man, not merely no European man, had ever seen before. He had every right to be – he probably was – more amazed than Balboa.

  The draper of Delft was already just short of seventy when he wrote:

  I had got the aforesaid water taken out of the ditches and runnels on the 30th of August: and on coming home, while I was busy looking at the multifarious very little animalcules a-swimming in this water, I saw floating in it, and seeming to move of themselves, a great many green round particles, of the bigness of sand-grains.

  When I brought these little bodies before the microscope [actually a single very small lens which he had ground himself and fixed between two perforat
ed metal plates] I saw that they were not simply round, but that their outermost membrane was everywhere beset with many little projecting particles, which seemed to me to be triangular, with the end tapering to a point: and it looked to me as if, in the whole circumference of that little ball, eight such particles were set, all orderly arranged and at equal distances from one another: so that upon so small a body there did stand a full two thousand of the said projecting particles.

  This was for me a pleasant sight, because the little bodies aforesaid, how oft soever I looked upon them, never lay still; and because too their progression was brought about by a rolling motion …

  Each of these little bodies had enclosed within it 5, 6, 7, nay some even 12, very little round globules, in structure like to the body itself wherein they were contained.

  There is no mistaking the fact that what had just swum into Leeuwenhoek’s ken was that very original and inventive organism, Volvox. Through hundreds of millions of years it had waited in countless places for man to become aware of its existence and, ultimately, to guess how important a step it had taken in the direction of both consciousness and that curiosity which was leading the Dutch draper to seek out in the ditches of Delft. The ‘little projecting particles’ are the peripheral cells which enclose the watery jelly in Volvox’s interior. The ‘5, 6, 7, nay some even 12, very little round globules, in structure like to the body itself are the vegetative ‘daughter cells’ produced by a sort of virgin birth between the sexual generations, much as in some of the higher plants ‘offsets’ as well as seeds are produced. Nor did Leeuwenhoek’s observation stop there:

  While I was keeping watch, for a good time on one of the biggest round bodies … I noticed that in its outermost part an opening appeared, out of which one of the enclosed round globules, having a fine green color, dropped out; and so one after another till they were all out, and each took on the same motion in the water as the body out of which it came. Afterwards, the first round body remained lying without any motion: and soon after a second globule, and presently a third, dropped out of it; and so one after another till they were all out and each took its proper motion.

  After the lapse of several days the first round body became as it were, again mingled with the water; for I could perceive no sign of it.

  In other words Leeuwenhoek saw both the liberation of the daughter colonies and also, though he did not realize its importance, something even more remarkable. He saw Volvox yielding to one of its two remarkable inventions – natural (or inevitable) Death. The other half of the strange story eluded him completely. He did not know that after a few generations have been vegetatively reproduced by the process he observed there comes a generation that will produce eggs which must be fertilized by sperm before they can develop.

  Nearly three hundred years later and more than five thousand miles from Delft, I, in my late turn, have also been looking at Volvox still rolling along in his gracefully expert way. Like most of the free-living protozoa, he has established himself pretty well over the whole earth outside the regions of eternal ice and there is no use speculating how the cosmopolitan distribution was achieved or how he got to America. During the vast stretches of time which have been his, routes were open at one time or another from every part of the earth to every other part.

  Historical plant geographers come almost to blows over the question how, for instance, the sweet potato got to the South Sea islands. But Volvox’s history goes back too far for even speculation or contention to reach. If only the fit survive and if the fitter they are the longer they survive, then Volvox must have demonstrated its superb fitness more conclusively than any higher animal ever has.

  My equipment is as much superior to Leeuwenhoek’s as his originality, ingenuity, and persistence were superior to mine. Instead of a single blob of glass fixed in front of a tiny tube holding water and held up to sun or candlelight, I use the compound microscope, which was not brought to its present state until the second half of the nineteenth century. Light passes from a mirror through a complicated set of lenses designed to place it at exactly the right spot. An image is formed by another series of lenses, cunningly designed to correct one another’s faults and then form an image in a black tube, this image again magnified by another set of lenses. I can confine Volvox to a hanging drop of water; I can light him from below, from the side, or even from the top. I can slow him down with sticky substances introduced into the drop; and I keep a supply of his species thriving in an artificial culture medium prepared for me by a biological supply house dealing in all sorts of improbable things. But though the beauty of Volvox must be even clearer to me than it was to Leeuwenhoek I have seen only what he saw and described in unmistakable terms.

  Under a magnification of no more than a hunded diameters – called by microscopists ‘very low power’ – Volvox looks about the size of a marble and when motionless less like a plant-animal than like some sort of jeweler’s work intended, perhaps, as an earring. The surface of the crystal sphere is set with hundreds of tiny emeralds; its interior contains five or six larger emeralds disposed with careless effectiveness.

  But Volvox is seldom motionless when alive and in good health. Bright as a jewel, intricate as a watch, and mobile as a butterfly, his revolutions bring one emerald after another into a position where they sparkle in the light. Though he is called the Roller [the English meaning of Latin, Volvox], he actually revolves rather than rolls, because he seems to turn on an invisible axis, much as the planets do, and he moves forward with this axis pointing in the direction of his motion. His speed varies and he frequently changes direction but I once counted the seconds it took him to cross the field of the microscope and calculated that his speed, in proportion to his size, is comparable to that of a man moving at a fast trot. Volvox, however, suggests nothing so undignified as a trot. There is something majestic and, one might almost imagine, irresistible about his revolutions – again like those of a planet. One half expects to hear some music of the spheres.

  Because the microscope has temporarily abolished the barrier of size which separates the universe of Volvox from my own, I enter temporarily into a dreamlike relationship with him, though he is unaware of my world and perhaps equally unaware of his own. Nevertheless there is an easy purposefulness in his movements and from what I have learned from the careful research of others I know that it is all much more complex and astonishing than I would ever have guessed or than Leeuwenhoek did guess.

  When I lift my head from the microscope the dream vanishes. But it is man and his consciousness which is really the fleeting dream. Volvox, or something very much like him, was leading his surprisingly complex life millions of years before man’s dream began and may well continue to do so for millions of years after the dream ends. Harder to realize is the fact that the enterprise and adventures of Volvox typify certain of the innovations and inventions which are casually summed up in the word ‘evolution’ and hence constituted some of the earliest and most essential steps toward making possible our dream.

  Such acquaintance with Volvox as I have gained from my own casual observations is as superficial as what one gets from a moment’s examination of a flower or from peering with mild curiosity at some strange animal behind the bars of a zoo. Yet even so casual an examination will lead one to guess at some of the significant facts.

  The predominant color of Volvox is green; the green looks like chlorophyl, and so it is. Moreover Volvox can be ‘cultured’ in a purely chemical solution. All of this suggests a plant rather than an animal, but biologists have decided that the classification is meaningless at this level. Both textbooks of zoology and textbooks of botany usually claim Volvox, and there are no hard feelings because zoologists and botanists agree that Volvox represents a stage of evolution at which plants have not diverged from animals. He is either the one or the other. Or, more properly, he is neither. He is not a plant or an animal; he is simply something which is alive.

  Concerning another ambiguity the observer is like
ly to make an even better guess. The walls separating one cell from another are clearly marked out and each of the cells which lie upon the periphery of the sphere is exactly like the other peripheral cells. Every one of them looks like a complete one-celled creature, lashing its two flagella precisely as many such one-celled creatures do – although, as was mentioned a few pages back, it is easy to see that Volvox’s cells do not crack their whips independently because they are co-ordinated in such a way that the organism as a whole moves purposefully forward in a given direction as though the individual flagella were controlled by a central intelligence.

  Yet the individual cells not only look like separate animals but are in fact morphologically all but indistinguishable from a certain very common specific free-living organism that occurs by the millions in stagnant rain water and is one of the usual causes why such water takes on a green color. Like this creature each of Volvox’s peripheral cells has a nucleus, two flagella, and an ‘eye spot.’ Any observer might easily suppose that a number of such tiny creatures had recently got together and formed a ball; or, that the one-celled creatures were the result of the dissolution of Volvoxes. But if the one-celled creatures did form aggregates which then became cooperative, all that happened millions of years ago and for a very long time Volvox has been much more than a mere casual grouping. One of his peripheral cells cannot live without the others. He is at least as much one creature as many and he must live or die as a whole. He can no longer dissolve into the myriad of individuals of which, long ago, his ancestors were no doubt composed.

  If you want to call him a multicelled animal you have to admit that the peripheral cells have retained a good deal of their original equipment for independent life. On the other hand if you want to call him a mere aggregation you have to concede that the individuals composing the colony have been co-ordinated, disciplined, and socialized to a degree no human dictator has yet even hoped to achieve in his ‘monolithic’ state. But in any event the guess that Volvox represents a stage in the development of the ‘higher’ multicellular animals and suggests how the transition was made is more immediately persuasive than many of the other guesses biology finds itself compelled to make.

 

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