4 
reserves which had been accumulated in order to support by detailed 
evidence the new doctrines. Hence, after publishing The Variations 
of Plants and Animals under Domestication , Mr. Darwin was again 
able to turn to Nature, not so much now for evidence of his theory, 
as by applying the principle of natural selection to point out how 
hitherto obscure problems might be explained. 
In the Variation of Animals and Plants , and in the Expression 
of the Emotions in Man and Animals, we have further evidence 
of Mr. Darwin’s enormous power of work, his faculty for collecting 
and arranging facts, and of the remarkable ability he possessed of draw- 
ing from them conclusions which indicated a wonderful insight into 
the secrets of nature. Further, in all of these works, as also in the 
Origin of Species, we have numerous observations of great impor- 
tance and interest, which mark out Mr. Darwin at once as an able 
and careful investigator ; but his fitness for pure zoological work is 
still more evident when we turn to the Naturalist’s Voyage Round 
the World, and to the Monographs on the Cirripedia. Those 
familiar with the elaborate memoirs on the Cirripedia, must feel 
that Mr. Darwin was as capable of prosecuting purely morpho- 
logical work as he was in performing physiological experiments, or 
of working out philosophical problems, and that although his 
zoological investigations are thrown into the background by his 
profound generalisations, they are of themselves of sufficient 
importance to entitle him to rank with the greatest biologists of any 
age. 
"What has been said of Mr. Darwin as a zoologist, may almost 
with equal propriety be said of him as a botanist and geologist. To 
quote again from the “ memorial notices — “ It is not too much to 
say that each of his botanical investigations, taken on its own 
merits, would alone have made the reputation of any ordinary 
botanist.” Most of his investigations on plants were communicated 
to the Linnean Society, and then published in a collected form. 
A volume on The Effects of Cross and Self-Fertilisation in the Vege- 
table Kingdom, was published in 1876, and in the following year 
appeared the results of his work On the Different Forms of Flowers 
on Plants of the same Species ; and in addition to these we have 
the memoirs On the Various Contrivances by which Orchids are 
Fertilised by Insects ; The Movements and Habits of Climbing 
