Seientifie Publications. 
THE BRAIN AND ITS FUNCTIONS. By J. Lurs, Physician to the 
Hospice de la Salpétriére. With lustrations. 12mo. Cloth, $1.50. 
“No living physiologiat is better entitled to speak with authority upon the 
structure and functions of the brain than Dr. Luys. His studies on the avatomy. 
of the nervous system are acknowledged to be the fullest and most systematic 
ever undertaken. Dr. Luys supports his conclusions not only by his own ana- 
tomical researches, but also by mapy functional observations of various other 
physiologists, including of course Professor Ferrier's now classical experi- 
ments.” — Sf. James’s Gazette. o 
‘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 have been instructed not only by much that is new, 
but by many sagacious practical hints such as it is well for everybody to under- - 
stand."— The Popular Science Monthly. 
THE CONCEPTS AND THEORIES OF MODERN PHYSICS. By 
J.B, 8vatro. 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 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 conservation of energy, the nebalar hypothesis, and other views, to find how 
much stands upon solid empirical zround. and how much rests opon 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 acuteness of his reasoning, and the 
singular precision and clearness of his style, are qualities which very seldom 
have been joincly exhibited in a scientific treative.”"—New York Sun. 
THE FORMATION OF VEGETABLE MOULD, THROUGH THE 
ACTION OF WORMS, WITH OBSERVATIONS ON THEIR 
HABITS. By Caartes Darwm, 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 
lesa marked 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 npon them. The main purpose of the work is to point ont 
the ehare 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 Lihat 3 Mr. Darwin for the new and 
interesting light he has thrown upon a subject co Jong overlooked, yet so full of 
interest and instruction, as the structure and the labors of the earth-worm.’’— 
Saturday Review. 
“ Respecting worms as among the most usefal portions of animate nature, 
Dr. Darwin relates, in this remarkable book, their structure and habits, the part 
a have played in the burial of ancient buildings and the denudation of the 
land, in the disintegration of rocks, the preparation of soil for the growth of 
plants, and in the natural history of the world."—-Boston Advertiser. 
D, APPLETON & CO., Publishers, 
1. 3. & 5 Bond Street. New York. 
