Scientific Publications. 
SCIENCE AND CULTURE, AND OTHER ESSAYS. By Profeesor 
T. H. HUXLEY. 12mo. Cloth, $1.50. 
" Of the essays that have been collected by Professor Huxley in this volume, 
the first four deal with some aspect of education. Most of the remainder are 
expositions of the results of biological research, and, at the same time, illustra- 
tions of the history of scientific ideas. Some of these are among the most inter- 
esting of Professor Huxley's contributions to the literature of science." London 
Academy. 
" When weary of the iteration of old thoughts dressed up in new phrases, it 
is refreshing to be brought into converse with one of the roost vigorous and acute 
thinkers of our time, who lias the power of putting his thoughts into language so 
clear and forcible." London Spectator. 
CAPITAL, AND POPULATION: A Study of the Economic Effects 
of their Rotations to Each Other. By FKEDEKICK B. HAWLEY. 
12mo, cloth. Price, $1.50. 
" It would be false modesty in me to seem unaware that the economic law I 
have attempted to establish equals in its influence upon economic conclusions 
any hitherto ascertained. Granted its truth, it throws new and decisive light 
on nearly all the unsolved problems of the science." Extract from Preface. 
PHYSICAL EDUCATION; or, The Health Laws of Nature. By 
FELIX L. us \VALD, M. D. 12mo. Cloth, $1.00. 
CONTENTS : Diet, In-door Life, Out door Life, Gymnastics, Clothing, Sleep, 
Recreation, Remedial Education, Hygienic Precautions, Popular Fallacies. 
"The author strikes right and left at the lingering traces of the traditional 
a i eticism which has had so much influence in warping our systems of education 
and life. He insists, at the outset, that the monkish identification of the human 
body with Satan and sin shall be discarded utterly, and that we shall regard this 
tabernacle of clay as the most perfect structure of the divine architect, and as the 
sole means by which we can work out our salvation. Nature ie the author's 
supreme law, and his cure for all maladies of the individual and the community 
is right living." Home Journal. 
" Dr. Oswald is as epigrammatic as Emerson, as spicy as Montaigne, and as 
caustic as Heine." Philadelphia Press. 
THE PRINCIPLES OF THE LAW: An Examination of the Law 
of Personal Rights, to discover the Principles of the Law, as 
ascertained from the Practical Rules of the Law, and har- 
monized with the Nature of Social Relations. By A. J. WILLARD. 
8vo, cloth. Price, |2.50. 
" A calm, dignified, able, and exhaustive treatise of a subject which is of great 
importance to every one. Mr. Willard first discusses the nature nnd origin of 
rights, obligations, and powers of fundamental social law and institutional law. 
He then expounds the science of law and defines the nature of all species of obli- 
gations and contracts. A general view of rights and powers is then brought 
forward, and a consideration of their special functions, as, for instance, the uso 
of air and wa f er and the principles of individual sustenance. The doctrine of 
individual redress and protection is thoroughly exumined. and a long and inter- 
esting discussion follows of nuisance-, wrongs, and injuries. The characteriza- 
tion of dueling and the pithy and convincing way in which its absurdity is shown 
are admirable. The treatment of the subject is so clear and logical, so simple 
and scholarly, that it deserves the highest praise. It is a work such n Aristotle 
might have written, had he lived in this latter day." Philadelphia Press. 
For sale by all booksellers ; or sent by mail, post-paid, on receipt of price. 
D. APPLETON & CO., Publishers, 
1, 3, & 5 Bond Street, New York, 
