Scientific Publications. 



PHYSIOLOGICAL AESTHETICS. By GRANT ALLEN. 12mo. Cloth, $1.50. 



" Mr Grant Allen has seized on a subject that is entirely ignored by physio- 

 loo-ical treatises, while those who have handled it from a psychological point of 

 view have in general been ignorant of physiology. Mr. Grant Allen has read 

 widely and has read well, while lie suggests several very interesting explanations 

 of mental condition that have hitherto been involved in hopeless obscurity." 

 Th-i Lancet. 



VARIATION OF ANIMALS AND PLANTS UNDER DOMESTI- 

 CATION. By CHARLES DARWIN, LL. D., F. R. S. With Illustrations. 

 Revised edition. 2 vols., 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 

 man's dominion, or which bear upon the general principles of variation." From 

 the Introduction. 



INSECTIVOROUS PLANTS, By CHARLES DARWIN, LL. D., F. R. S. 12mo. 

 Cloth, $2.00. 



MOVEMENTS AND HABITS OF CLIMBING PLANTS. By CHARLES 



DARWIN, LL. D., F. R. S. With Illustrations. 12mo. Cloth, $1.25. 

 CONTENTS. Chapter I. Twining Plants ; II. 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 CHARLES 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 CHARLES DARWIN, LL. D., F.R. S. 



12mo. Cloth, $2.00. 



"As plants are adapte:! by such diversified and effective means for cross- 

 fertiliz ition, it might have been inferred from this fact alone th-it they derived 

 same great advantage from the process : and it is the object of the present work 

 to show the nature and importance of the benefits thus derived. There are, how- 

 ever, some exceptions to the rule, but they need not make UP 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 adapt?d 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 



