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…"it is my hope, as well as belief, that
these my Labours will be no more comparable to the Productions of
many other Natural Philosophers, who are now every where busie about greater
things; then my little Objects are to be compar'd to the greater and
more beautiful Works of Nature, A Flea, a Mite, a Gnat, to an Horse, an
Elephant, or a Lyon.”—Robert Hooke
at the end of his 28-page preface to Micrographia1 (1665)
I’ve written elsewhere in this blog about Robert Hooke, and
how, if there had somehow and impossibly been no Newton, he might’ve taken Sir Isaac’s place
in the popular mind. He was a tireless,
relentless observer and experimenter, who lost little effort in a stranded idea
and pursued interesting and problematic questions relentlessly. More than others too he chased his won glory—minor
but long and insistent—the years of which wore thin on many people in the
scientific community. But there were
many characteristics of the man that made him not quite so lovable and
endearing—not that Newton was any of those things, as he was not, but if you
are going to be a secondary luminary to a super nova you’ve got to have
something else going for you that the other man doesn’t have—sharing, helpful,
greatly generous—to get you into the long pre-dusty pages of history. Also it would’ve
helped if Hooke chose his battles with a little more aplomb and ingenuity—the
war which began in 1672 with Newton went very badly for Hooke and followed him
to the grave (and far beyond).
What I’d like to talk about right now, though, of the many
things to talk about concerning Robert Hooke, is the most iconographic image he
ever produced, and perhaps one of the most famous scientific images of the 17th
century—the flea.
The 28-year old Hooke published the results in a gorgeous
and revolutionary book, Micrographia (a lovely e-text edition appears at Gutenberg, here) in 1665, which became an instant
best seller and highly praised and valued. (Samuel Pepys, perhaps among the
shiniest stars whose imprimatur was like a royal blessing, said the book (was)
"the most ingenious book that I ever read in my life.") There is no
telling what the people of the mid-17th century thought of seeing
such incredible discoveries in the little semi-invisible stuff that made up
their normal, daily lives. The only thing that somewhat equates to this
would be if the first images of the Hubble were those of Earth-bound objects
whose detail had previously been unknown. Hooke’s observations and
drawings of things like the common flea were just an astonishment—that such a
creature of “low order” could have such intricate detail and design was a
complete revelation. The drawings of the fly's eye, too, was an
inescapable wonder, an incredible object to consider as having any
detail pre-microscope, and then revealed to have unimaginable design and elegance.
It turns out that the flea was not the most important object
that Hooke had in mind with the Micrographic—it
was part of an overall attempt at making sense of all creation, the bug part of
the book occupying only a part of the (only) one-fifth of the book’s 246 pages
devoted to living creatures. The book
actually starts with inanimate objects (the needle, followed by a razor, linen, silk, glass canes, flint, and so on), and then works it way through living
stuff, ending up talking about light and the Moon and the cosmos.
The opening images of the book are actually
of the edge of a razor and the head of a needle—under magnification they showed
a bitter, ragged edge and a nubby, pitted point (respectively)—which would have
been almost as unimaginable and shocking as the flea….except that the flea of
course opened possibilities of entire worlds of things alive in our
semi-invisible environment. Things
really weren’t as they seemed to be.
Hooke’s flea, as spectacular and revolutionary as it was,
was only a part of the story—the rest of the behind-the-picture narrative lies
in a much wider and more complex view of all things, living and not,
in which Hooke tells us we should employ the
microscope/macroscope to solve disputes in our “wandring senses”. Not bad
advice at all.
In the preface to the
Micrographia Hooke states:
Thus all the uncertainty, and mistakes of humane actions, proceed either
from the narrowness and wandring of our Senses, from the slipperiness or
delusion of our Memory, from the confinement or rashness of our Understanding,
so that 'tis no wonder, that our power over natural causes and effects is so
slowly improv'd, seeing we are not only to contend with the obscurity and difficulty
of the things whereon we work and think, but even the forces of our own
minds conspire to betray us.
These being the dangers in the process of humane Reason, the remedies of
them all can only proceed from the real, the mechanical, the experimental
Philosophy, which has this advantage over the Philosophy of discourse
and disputation, that whereas that chiefly aims at the subtilty of its
Deductions and Conclusions, without much regard to the first ground-work, which
ought to be well laid on the Sense and Memory; so this intends the right
ordering of them all, and the making them serviceable to each other…
He continues with a short outline of how to accomplish this:
The first thing to be undertaken in this weighty work, is a watchfulness
over the failings and an inlargement of the dominion, of the Senses.
To which end it is requisite, first, That there should be a scrupulous
choice, and a strict examination, of the reality, constancy, and
certainty of the Particulars that we admit: This is the first rise whereon
truth is to begin, and here the most severe, and most impartial diligence, must
be imployed; the storing up of all, without any regard to evidence or use, will
only tend to darkness and confusion. We must not therefore esteem the riches of
our Philosophical treasure by the number only, but chiefly by the weight;
the most vulgar Instances are not to be neglected, but above all, the
most instructive are to be entertain'd; the footsteps of Nature are to
be trac'd, not only in her ordinary course, but when she seems to be put
to her shifts, to make many doublings and turnings, and to use
some kind of art in indeavouring to avoid our discovery.
The next care to be taken, in respect of the Senses, is a supplying of
their infirmities with Instruments, and, as it were, the adding of artificial
Organs to the natural; this in one of them has been of late years
accomplisht with prodigious benefit to all sorts of useful knowledge, by the
invention of Optical Glasses. By the means of Telescopes, there is
nothing so far distant but may be represented to our view; and by the
help of Microscopes, there is nothing so small, as to escape our
inquiry; hence there is a new visible World discovered to the understanding. By
this means the Heavens are open'd, and a vast number of new Stars, and new
Motions, and new Productions appear in them, to which all the ancient
Astronomers were utterly Strangers. By this the Earth it self, which lyes so
neer us, under our feet, shews quite a new thing to us, and in every little
particle of its matter; we now behold almost as great a variety of
Creatures, as we were able before to reckon up in the whole Universe it
self.
1.
The
full title of the book: MICROGRAPHIA, OR, SOME Physiological Descriptions OF MINUTE BODIES, MADE BY MAGNIFYING.