Scientific Publications, 



THE BRAIN AND ITS FUNCTIONS. By J. Luts, Physician to the 

 Hospice de la Salpetriere. With IlluBtrations. 12mo. Clotli, $1.50. 



" No living physiologist is hotter entitled to speak with authority upon fhr 

 Pt'-uj:ture and functions ol' the brain than Dr. Luys. Hi< studies on the anatomy 

 of (he nervous system are aclcnowledf^ed to be "the tullest and most systematic 

 ov.r undertaken. Dr. Luys supports his conclusions not only by his own ana- 

 tomical researches, but also by many functional ot)servation8 of various oilier 

 physiologists, including of course Professor Ferrier's low classical experi- 

 ments."— iS<. Jameses Gazette. 



" Dr. Luys, at the head of the great French Insane Asylum, is one of the most 

 eminent and successful investigators of cerebral science now living; and he has 

 given unqnestionatily the clearest and most interesting brief acconut yet made of 

 the structure and operations of the brain. We have been fascinated by this vol- 

 ume more than by any other treatise we have yet seen on the machinery of sen- 

 sibility and thought; and we have been instructed not only by nmch that is new, 

 but by many sairacioua practical hints such as it is well for everybody to under- 

 stand." — Tlie I'opular Science Monthly. 



THE CONCEPTS AND THEORIES OF MODERN PHYSICS. By 



J. B. Stallo. 12mo. Cloth, $1.75. 



"Judge Stallo's work is an inquiry into the validity of those mechanical con- 

 ceptions of the universe which are now held as fundamental in physical science. 

 He taki!8 up the leading modern doctrines which nre based upon this mechanical 

 conception, such as the atomic cocslitution of matter, the kinetic theory of gases, 

 the conservation of energy, the nebular hypothesis, and other views, to find how 

 much stands upon solid empirical LTound. and how much rests upon metaphys- 

 ical speculation. Since the appearance of Dr. Draper's ' Religion and Science,' 

 no book has been published in the country calculated to make so deep an impres. 

 sion on thoughtful and educated readers as this volume. . . . The range and 

 rninutenoss of the author's learning, the acutcncss of his reasoning, and the 

 singular precision !ind clearness of his style, are qualities which very seldom 

 have been join.fly exhibited in a scientific treatise."— iVew York Sun. 



THE FORMATION OF VEGETABLE MOULD. THROUGH THE 

 ACTION OF WORMS, WITH OBSERVATIONS ON THEIR 

 HABITS. By Charles Darwin, LL. D., F. R. S., author of " On the 

 Origin of Species," etc., etc. With Illustrations. 12mo, cloth. Price, $1.50. 



" Mr. Darwin's little volume on the habits and instincts of earth-worms is no 

 les3 marlvcd than the earlier or more elaborate efforts of his genius by freshness 

 of observation, unfailing power of interpreting and correlating facts, and logical 

 vigor in generalizing upon them. The main purpose of the work is to point out 

 the share which worms have taken in the formation of the layer of vegetable 

 mould which covers the whole surface of the land in every moderately humid 

 country. All lovers of nature will unite in thanking Mr. Darwin for the new and 

 interesting light he has thrown upon a subject so long overlooked, yet so full of 

 interest and instruction, as the structure and the labors of the earth-worm." — 

 Sat'Tday Review. 



" Respecting worms as among the most nseful portions of animate nature. 

 Dr. Darwin relates, in this remarkable book, their structure and habits, the part 

 they have played in the burial of ancient bnildings and the denudation of the 

 land, in tho disintegration of rocks, the preparation of soil for the growth ol 

 plants, and in the natural history of the world." — Boston Advertiser. 



D. APPLETON & CO., Publishers, 



1. 3. & 5 Bond Street. New York, 



