can.
Arctic.
British.
Colonial.
European.
French.
Greenland.
Holland.
India.
Japan.
New Zealand.
-distribution of.
-of islands.
-local.
-tabulation of.

Florida, A. Agassiz on Coral reefs.
-Coral reefs.

Flourens, experiments on pigeons.

Flower, Sir William H., Letter to.
-on muscles of the os coccyx.

Flowering plants, possible origin on a Southern Continent.
-sudden appearance of.

Flowers, at Down.
-Darwin's work on forms of.
-monstrous.
-morphological characters.
-regular and irregular.
-cross-fertilisation in inconspicuous.
-ignorance of botanists on mechanism of.

"Flowers and their unbidden Guests," Dr. Ogle's translation of Kerner's
"Schutzmittel des Pollens."

Flying machine, Darwin on Popper's proposed.

Folding of strata.

Foliation and cleavage, reference by A. Harker to work on.

Foliation, aqueous deposition and.
-Darwin considers his observations on cleavage less deserving of
confidence than those on.
-Darwin on.
-parallelism with cleavage.
-relation to rock-curvature.

Food, as determining number of species.

Foraminifera.

Forbes, D., on the Cordilleras.
-on elevation in Chili.
-on nitrate of soda beds in S. America.

Forbes, Edward, F.R.S. (1815-1854): filled the office of Palaeontologist to
the Ordnance Geological Survey, and afterwards became President of the
Geological Society; in 1854--the last year of his life--he was appointed to
the chair of Natural History in the University of Edinburgh. Forbes
published many papers on geological, zoological, and botanical subjects,
one of his most remarkable contributions being the well-known essay "On the
Connexion between the Distribution of the Existing Fauna and Flora of the
British Isles and the Geological Changes which have affected their area"
("Mem. Geol. Surv." Volume I., page 336, 1846). (See "Proc. Roy. Soc."
Volume VII., page 263, 1856; "Quart. Journl. Geol. Soc." Volume XI., page
xxvii, 1855, and "Ann. Mag. Nat. Hist." Volume XV., 1855.
-on flora of Azores.
-on Chambers as author of the "Vestiges."
-on continental extension.
-Darwin opposed to his views on continental extension.
-Darwin's opinion of.
-Article on distribution.
-on continuity of land.
-on plant-distribution.
-introductory lecture as professor in Edinburgh.
-on former lower extension of glaciers in Cordillera.
-lecture by.
-letter to Darwin from.
-on Madagascar insects.