Scientific Publications. 



THE BRAIN AND ITS FUNCTIONS. By J. LuTS, PhyBician to the 

 Hospice de la SalpStri^re. With lUuBtratiouB. 12ino. Cloth, {1.60. 



" No livins physiologist is better entitled to speak with authority npcn thr 

 structure and functions or the brain than Br. Lnys. His studies on the anatomy 

 of the nerTDUB system are acknowledged to be the fuUcBt and most systematic 

 ever undertaken. Dr. Luys Bupports his conclusions not only by his own aua- 

 tumical researches, but also by many functional observationB of various other 

 physiologists, including of course ProfeBsor Ferrier's now classical experi- 

 ments."— 5if. James's Oazelte. 



" Dr. Lays, at the head of the great French Insane Asylnm, is one of the most 

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

 given unquestionably the clearest and most intereeting brief account 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- 

 Bibility and thought ; and we have been Instructed not only by much that is new, 

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

 stand." — Tne Popular 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 phjrsical science. 

 He takes up the leading modern doctrines which are based upon this mechanical 

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

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

 much stands upon solid empirical ground, 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 thoughtfbl and educated readers as this volume. . . . The range and 

 minuteness of the author's learning, the acuteness of his reasoning, and the 

 Binsular precision and clearness of" his stylo, are qualities which very seldom 

 have been jointly exhibited in a scientific treatise."— iV«fi Tork Sun. 



THE FORMATION OF VEGETABLE MOUIiD, THROUGH THE 

 ACTION OF WORMS, WITH OBSERVATIONS ON THEIR 

 HABITS. By Chablbs Dabwto, LL. D., F.E. S., author of "On the 

 Originof Species," etc., etc. With Illustrations. 12mo, cloth. Price, tl.60. 



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

 less marked than the earlier or more elaborate efforts of his Renins by freshness 

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

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

 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 moderatelyhnmld 

 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."— 

 Saturday Beview. 



" Respecting worms as among the most nsefnl 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 the dlBlntegratlon of rocks, the preparation of soil for the growth oi 

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



D, APPL-ETON & CO., Publishers, 



1. 3. & 6 Bond Street. New Tork. 



