Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters

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Mr. Rich leaves a single near relative, to whom is bequeathed the life-interest in his property.

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Published in Science and Culture, p. 310.

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The "Genealogy of Animals" (The Academy, 1869), reprinted in Critiques and Addresses.

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An English edition is published by the Clarendon Press, 1890.

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Sachs, Geschichte d. Botanik, p. 419.

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That is to say, flowers possessing both stamens, or male organs, and pistils or female organs.

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Christian Conrad Sprengel, born 1750, died 1816.

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Fertilisation of Flowers (Eng. Trans.) 1883, p. 3.

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Das entdeckte Geheimniss der Natur im Baue und in der Befruchtung der Blumen. Berlin, 1793.

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The order to which the pea and bean belong.

271

Gardeners' Chronicle, 1857, p. 725. It appears that this paper was a piece of "over-time" work. He wrote to a friend, "that confounded Leguminous paper was done in the afternoon, and the consequence was I had to go to Moor Park for a week."

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The sweet pea and everlasting pea belong to the genus Lathyrus.

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Gardeners' Chronicle, 1858, p. 828.

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He published a short paper on the manner of fertilisation of this flower, in the Gardeners' Chronicle 1871, p. 1166.

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The woodpecker was one of his stock examples of adaptation.

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It is a modification of the upper stigma.

277

This rather obscure statement may be paraphrased thus: —

The machinery is so perfect that the plant can afford to minimise the amount of pollen produced. Where the machinery for pollen distribution is of a cruder sort, for instance where it is carried by the wind, enormous quantities are produced, e. g. in the fir tree.

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"Darwin considéré, &c.," Archives des Sciences Physiques et Naturelles 3ème période. Tome vii. 481, 1882.

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May 24th, 1862.

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June 14th, 1862.

281

My father's "Prefatory Notice" to this work is dated February 6th, 1882, and is therefore almost the last of his writings.

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See Autobiography, p. 48.

283

The pollen or fertilising element is in each species adapted to produce a certain change in the egg-cell (or female element), just as a key is adapted to a lock. If a key opens a lock for which it was never intended it is an incidental result. In the same way if the pollen of species of A. proves to be capable of fertilising the egg-cell of species B. we may call it incidental.

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Proc. Amer. Acad. of Arts and Sciences, 1858.

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