ne of.

"Creed of Science," Graham's.

Cresy, E., letters to.

Cretaceous flora, Heer on Arctic.

Crick, W.D., letter to.

Crinum, crossing experiments on.
-C. passiflora, fertility of.

Crocker, W., work on hollyhocks.

Croll, James (1821-90): was born at Little Whitefield, in Perthshire.
After a short time passed in the village school, he was apprenticed as a
wheelwright, but lack of strength compelled him to seek less arduous
employment, and he became agent to an insurance company. In 1859 he was
appointed keeper in the Andersonian University and Museum, Glasgow. His
first contribution to science was published in the "Philosophical Magazine"
for 1861, and this was followed in 1864 by the essay "On the Physical Cause
of the Change of Climate during the Glacial Period." From 1867 to 1881 he
held an appointment in the department of the Geological Survey in
Edinburgh. In 1876 Croll was elected a Fellow of the Royal Society. His
last work, "The Philosophical Basis of Evolution," was published in the
year of his death. ("Nature," Volume XLIII., page 180, 1891.)
-Darwin on his theory.
-on icebergs as grinding agents.
-letters to.
-Lyell on his theory.
-on sub-aerial denudation.
-on time.

Crookes, Sir W., on spiritualism.

"Cross and Self-fertilisation," Darwin's book on.

Cross-fertilisation, Darwin's experiments on self- and.
-check to endless variability.
-Darwin states that as a rule flowers described as adapted to self-
fertilisation are really adapted to.
-of inconspicuous flowers.
-all plants require occasional.
-small advantages when confined to same plant.

Crosses, fertility and sterility of.

Crossing, agreement between Darwin's and breeders' views.
-counterbalance of.
-Darwin's views on.
-effects of.
-experiments on.
-Hooker's views.
-in animals and plants.
-influence of blood in.
-intermediate character of results.
-Natural Selection and disinclination towards.
-offspring of.
-of primroses and cowslips.
-and sterility.
-Westphalian pig and English boar.
-botanists' work on.
-importance of.
-pains taken by Nature to ensure.
-in Pisum.
-in Primula.
-in individuals of same species.
-F. Muller compliments Darwin on his chapter on.
-and separate sexes in trees.

Crotalaria.

Crotalus.

Cruciferae, action of fungus on roots.

Cruciferous flower, morphology.

Cruger, Dr., on cleistogamic fertilisation of Epide