rbitt's potato experiment.
-letters to.
-on earthworms.
-observations on fertilisation of Passiflora.
-recollections of Darwin.
-seeds sent to.

Fawcett, Henry (1833-84): Professor of Political Economy at Cambridge,
1863, Postmaster-General 1880-84. See Leslie Stephen's well-known "Life."
-defends Darwin's arguments.
-letter to.
-letter to Darwin.

Fear, expression of.

Felis, range.

Fellowships, discussion on abolition of Prize-.

Felspar, segregation of.

Females, modification for protection.

"Fenland, Past and Present," by Miller and Skertchley.

Fergusson on Darwinism.

Fernando Po, plants of.

Ferns, Scott on spores.
-Darwin's ignorance of.
-variability "passes all bounds."

Ferrier, Dr., groundless charge brought against, for infringement of
Vivisection Act.

Fertilisation, articles in "Gardeners' Chronicle."
-of flowers.
-H. Muller's work on.
-and sterility.
-Darwin fascinated by study of.
-different mechanisms in same genus.
-travelling of reproductive cells in.

Fertilisation of orchids, Darwin's work on.
-paper by Darwin in "Gardeners' Chronicle" on.

"Fertilisation of Orchids," Asa Gray's review.
-Hooker's review.
-description of Acropera and Catasetum in.
-H. Muller's "Befruchtung der Blumen," the outcome of Darwin's.

Fertility, Natural Selection and.
-and sterility.
-Primula.
-Scott on varieties and relative.

Festuca.

Figs, F. Muller on fertilisation of.

Finmark, Bravais on sea-beaches of.

Fir (Silver), Witches' brooms of.

"First Principles," Spencer's.

Fish, Pictet and Humbert on fossil.

Fiske, J., letter to.

Fissure-eruptions.

Fitton, reference to his work.

FitzRoy (Fitz-Roy), Captain, and the "Beagle" voyage.
-writes preface to account of the voyage.
-Darwin nearly rejected by.
-letter to "Times."

Flagellaria, as a climber.

Flahault, on the peg in Cucurbita.

Fleeming Jenkin, review of "Origin" by, see Jenkin.

Flinders, M., voyage to Terra Australis by.

Flint implements found near Bedford.

Flints, abundance and derivation of, at Down.
-Darwin on their upright position in gravel.

Floating ice, Darwin on agency of.
-J. Geikie underestimates its importance.
-transporting power of.

Flora, Darwin's idea of an Utopian.
-Hooker's scheme for a.
-Hooker's work on Tasmanian.

"Flora antarctica," Hooker's.

"Flora fossilis arctica," Heer's.

Floras:
N. Ameri