Seientifie Publications. 
PHYSIOLOGICAL AESTHETICS, By Grant ALLEN. 12mo. Cloth, $1.50. 
‘“Mr. Grant Allen has seized on a subject that is entirely iznored by physio- 
Jogical treatises, while those who have handled it from a psychological point of 
view have in general been ignorant of physiology. Mr. Grant Allen bas read 
widely and has read well, while he suggests several very interesting explanations 
of mental condition that have hitherto been involved in hopeless obscurity.”’— 
the Lancet. 
VARIATION OF ANIMALS AND PLANTS UNDER DOMESTI- 
CATION. By Cuarues Darwin, LL.D., F.R.S. With Illustrations. 
Revised edition. 2vols.,12mo. Cloth, $5.00. 
“The object of this work is not to describe all the many races of animals 
which have been domesticated by man, and of the plants which have been culti- 
vated by him. It is my intention to give under the head of each species only 
such facts as I have been able to collect or observe, showing the amount and 
nature of the changes which animals and plants have undergone while under 
inan’s dominion, or which bear upon the general principles of variation.”’— From 
the Introduction. 
INSECTIVOROUS PLANTS. By Caarntzts Darwin, LL.D., F.R.S. 12mo. 
Cloth, $2.00. 
MOVEMENTS AND HABITS OF CLIMBING PLANTS. By CHaR.es 
Darwin, LL. D., F.R.S. With Illustrations. 12mo. Cloth, $1.25. 
ConTENTs.—Chapter I. Twining Plants; IJ. Leaf-Climbers; III and IV. 
Tendril-Bearers ; V. Hook and Root Climbers ; Concluding Remarks. 
VARIOUS CONTRIVANCES BY WHICH ORCHIDS ARE FER- 
TILIZED BY INSECTS. By Cuantes Darwin, LL. D., F.R.S. 
With Illustrations. Revised edition. 12mo. Cloth, $1.75. 
“The object of the work is to show that the contrivances by which orchids 
are fertilized are as varied and almost as perfect as any of the most beautiful 
adaptations in the animal kingdom; and, secondly, to show that these contriv- 
ances have for their main object the fertilization of the flowers with pollen 
brought by insects from a distinct plant.”—From the Introduction. 
EFFECTS OF CROSS- AND SELF-FERTILIZATION IN THE 
VEGETABLE KINGDOM. By Cuartrs Darwin, LL. D., F.R.S. 
12mo. Cloth, $2.00. 
“As plants are adapted by such diversified and effective means for cross- 
fertilization, it might have been inferred from this fact alone thut they derived 
some great advantage from the process ; and it is the object of the present work 
to show the nature and importance of the benefits thns derived. There are, how- 
ever, some exceptions to the rule, but they need not make us doubt its truth any 
more than the existence of some fev plants which produce flowers, and yet never 
~ set seed, should make us doubt that flowers are adapted for the production of 
seed and the propagation of the species.” — From the Introductory Remarks. 
New York: D. APPLETON & CO., 1, 3 & 5 Bond Street, 
