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s of extinction would
allow the existence of only a few species in such genera. Whenever we
meet (which will be on the 23rd [at the] Club) I shall much like to hear
whether this strikes you as sound. I feel all the time on the borders of
a circle of truism. Of course I could not think of such a request,
but you might possibly:--if Bentham does not think the whole subject
rubbish, ask him some time to pick out the dozen most anomalous genera
in the Leguminosae, or any great order of which there is a monograph by
which I could calculate the ordinary percentage of species to genera. I
am the more anxious, as the more I enquire, the fewer are the cases
in which it can be done. It cannot be done in birds, or, I fear, in
mammifers. I doubt much whether in any other class of insects [other
than Curculionidae].

I saw your nice notice of poor Forbes in the "Gardeners' Chronicle,"
and I see in the "Athenaeum" a notice of meeting on last Saturday of his
friends. Of course I shall wish to subscribe as soon as possible to any
memorial...

I have just been testing practically what disuse does in reducing
parts. I have made [skeletons] of wild and tame duck (oh the smell of
well-boiled, high duck!), and I find the tame duck ought, according to
scale of wild prototype, to have its two wings 360 grains in weight; but
it has only 317, or 43 grains too little, or 1/7 of [its] own two wings
too little in weight. This seems rather interesting to me. (43/2. On
the conclusions drawn from these researches, see Mr. Platt Ball, "The
Effects of Use and Disuse" (Nature Series), 1890, page 55. With regard
to his pigeons, Darwin wrote, in November 1855: "I love them to that
extent that I cannot bear to kill and skeletonise them.")

P.S.--I do not know whether you will think this worth reading over. I
have worked it out since writing my letter, and tabulate the whole.

21 orders with 1 genus, having 7.95 species (or 4.6?).

29 orders with 2 genera, having 15.05 species on an average.

23 orders each with 3 genera, and these genera include on an average 8.2
species.

20 orders each with 4 genera, and these genera include on an average
12.2 species.

27 orders each with above 50 genera (altogether 4716 genera), and these
genera on an average have 9.97 species.

From this I conclude, whether there be many or few genera in an order,
the number of species in a genus is not much affected; but perhaps when
[there is] only one genus in an order it will be affected, and this will
depend whether the [genus] Erythroxylon be made a family of.

LETTER 44. TO J.D. HOOKER. Down, April 8th [1856].

I have been particularly glad to get your splendid eloge of Lindley. His
name had been lately passing through my head, and I had hoped that Miers
would have proposed him for the Royal medal. I most entirely agree that
the Copley (44/1. The late Professor Lindley never attained the honour
of the Copley medal. The Royal medal was awarded to him in 1857.) is
more appropriate, and I daresay he would not have valued the Royal. From
skimming through many botanical books, and from often consulting the
"Vegetable Kingdom," I had (ignorant as I am) formed the highest opinion
of his claims as a botanist. If Sharpey will stick up strong for him,
we should have some chance; but the natural sciences are but feebly
represented in the Council. Sir P. Egerton, I daresay, would be strong
for him. You know Bell is out. Now, my only doubt is, and I hope that
you will consider this, that the natural sciences being weak on the
Council, and (I fancy) the most powerful man in the Council, Col.
S[abine], being strong against Lindley, whether we should have any
chance of succeeding. It would be so easy to name some eminent man whose
name would be well-known to all the physicists. Would Lindley hear of
and dislike being proposed for the Copley and not succeeding? Would it
not be better on this view to propose him for the Royal? Do think of
this. Moreover, if Lindley is not proposed for the Royal, I fear both
Royal medals would go [to] physicists; for I, for one, should not like
to propose another zoologist, though Hancock would be a very good man,
and I fancy there would be a feeling against medals to two botanists.
But for whatever Lindley is proposed, I will do my best. We will talk
this over here.

LETTER 45. TO J.D. HOOKER. Down, May 9th [1856].

...With respect to Huxley, I was on the point of speaking to Crawford
and Strezlecki (who will be on Committee of the Athenaeum) when I
bethought me of how Owen would look and what he would say. Cannot you
fancy him, with slow and gentle voice, asking "Will Mr. Crawford tell
me what Mr. Huxley has done, deserving this honour; I only know that
he differs from, and disputes the authority of Cuvier, Ehrenberg, and
Agassiz as of no weight at all." And when I began to tell Mr. Crawford
what to say, I was puzzled, and could refer him only to some excellent
papers in the "Phil. Trans." for which the medal had been awarded. But
I doubt, with an opposing faction, whether this would be considered
enough, for I believe real scientific merit is not thought enough,
without the person is generally well known. Now I want to hear what you
deliberately think on this head: it would be bad to get him proposed and
then rejected; and Owen is very powerful.

LETTER 46. TO J.D. HOOKER. Down [1856].

I have got the Lectures, and have read them. (46/1. The reference is
presumably to the Royal Institution Lectures given in 1854-56. Those
which we have seen--namely, those reprinted in the "Scientific Memoirs,"
Volume I.--"On the Common Plan of Animal Form," page 281; "On certain
Zoological Arguments, etc." page 300; "On Natural History as Knowledge,
Discipline, and Power," page 305, do not seem to us to contain anything
likely to offend; but Falconer's attack in the "Ann. and Mag. of Nat.
Hist." June 1856, on the last-named lecture, shows strong feeling. A
reply by Mr. Huxley appeared in the July number of the same Journal. The
most heretical discussion from a modern standpoint is at page 311, where
he asks how it is conceivable that the bright colours of butterflies and
shells or the elegant forms of Foraminifera can possibly be of service
to their possessors; and it is this which especially struck Darwin,
judging by the pencil notes on his copy of the Lecture.) Though I
believe, as far as my knowledge goes, that Huxley is right, yet I think
his tone very much too vehement, and I have ventured to say so in a
note to Huxley. I had not thought of these lectures in relation to the
Athenaeum (46/2. Mr. Huxley was in 1858 elected to the Athenaeum Club
under Rule 2, which provides for the annual election of "a certain
number of persons of distinguished eminence in science, literature, or
the arts, or for public services."), but I am inclined quite to agree
with you, and that we had better pause before anything is said...(N.B.
I found Falconer very indignant at the manner in which Huxley treated
Cuvier in his Royal Institution lec

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