Scientific Publications. 



TIIE BRAIN AND ITS FUNCTIONS. By J. Lctb, Physician to the 

 Hospice dc la Salpetriere. With Illustrations. 12mo. Clotb, $1.50. 



" No llvini; physiologist is better entitled to speak with authority upon tho 

 structure and functions of the brain than Dr. Lays. His studies on the anatomy 

 of ihe nervous system are acknowledged to be the fullest and most systematic 

 err undertaken. L)r. Luys supports his conclusions not only by his own ana- 

 tomical researches, but also by many functional observations of various other 

 physiologists, Including of course Professor Ferrier's now classical experi- 

 ments." — St. James's 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 unquestionably the clearest and most interesting 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- 

 sibility and thought ; and we liave been instructed not only by much that is new, 

 bat by many sagacious practical hints such as it is well for everybody to under- 

 stand."— The Tvpular Science Monthly. 



TIIE CONCEPTS AND THEORIES OF MODERN PHYSICS. Dy 



J. B. 3tallo. 12mo. Clotb, $1.75, 



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

 ception* of the universe which arc now held as fundamental in physical science. 

 He Lakes up the 1 -ailing modern doctrines which are based upon this mechanical 

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

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

 much stands upou 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 thoughtful and educated readers as this volume. . . . The range and 

 minuteness, of the author's learning, the sentences of his reasoning, and tho 

 simnilar precision snd clearness, of hi 1 * style, are qualities which very seldom 

 have been jointly exhibited in a scientific treatise."— Mtw l'ork Sun. 



Tin: FORMATION or VEGETABLE MOULD, THROUGH tiik 

 action OF WORMS, with OBSERVATIONS OH THEIR 



HABITS. By Cuamlm Dabwtjt, 1. 1.. I).. P.B.8., author of "On the 



Origin of Specie-," etc., etc. With Illustrations. 12ino, cloth. Price, $1.50. 



" Mr. Darwin's little volume OB thfl habits and instincts of earthworms is no 



marked than the e irlier or more <\ .borate effbi ts of hi- genius by freshness: 

 of observation, unfailing power of Interpreting ami correlating fact-, and logical 



vi,'or in generalising upon them. The main purpose Of the work in tO point out 

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



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

 i onntry, \ I lovers of nature will unite in thanking Mr. Darwin for the new and 

 inter hi be bas thrown npon s subject so long overlooked, yet so full of 



Interest and instruction, as the structure and the labors of the earthworm." — 

 6 U nt "J /.'• ' /• ii . 



tin I worms as amoiiL' the most useful portions of animate nature, 

 Dr Dsrwln r.-lnte., in this remarkable hook, their structure and babits, the pari 

 tbaybava In the burial of ancient buildings snd the denudation of the 



land, in the disintegration of rork«, the preparation of ioll for the k' r " wl ' i °' 

 pLiu'.s, and In :hr natural history of the world."— Jloeton A<tvertis<r. 



D. appleton & CO., Publishers, 



1. 3, dr. 5 Bond Street, Now York. 





