THE ECONOMIC THEORY OF THE LOCATION OF RAILWAYS.

By Arthur M. Wellington, C.E. Price $2.00. New York city: Office of

the Railroad Gazette, 73 Broadway.

The author of this book is thoroughly conversant with his subject,

and his statement that the book has gradually grown from a few

notes into a volume may be accepted as an explanation of the

somewhat fragmentary character of the work. He asserts that "all

our railways are uneconomically located," and "in many cases these

errors are shockingly evident." If these statements are true, he

is right in stating that "there is something almost pitiful in

the waste of human labor enforced by such costly blundering." He

considers that other countries have made lamentable blunders in

locating their railroads, so that the suffering stockholders of

American lines may take comfort from the thought that others are

or may be as badly off.

FRUIT AND BREAD. A SCIENTIFIC DIET. By Gustav Schlickeysen. Translated

from the German by M. L. Holbrook, M.D. With an Appendix. Illustrated.

New York city: M. L. Holbrook & Co.

The author and translator of this little treatise are firm

believers in vegetarianism, and present in a highly attractive

form the main arguments which sustain them in their position. The

subject is most carefully and systematically treated, and although

the conclusions at which the author arrives are greatly at

variance with modern belief and practice, the book is nevertheless

entitled to proper and respectful consideration. Illustrations are

given of the teeth and stomachs of various animals, and these are

compared with the similar organs existing in man, so exhibiting

in a clear and satisfactory manner the perfect adaptedness of the

latter to a purely vegetable regimen, which is certainly something

more than merely accidental. Altogether the book is well worthy

of perusal by others than those more immediately interested in the

question of diet.

THEORETICAL NAVAL ARCHITECTURE: a Treatise on the Calculations

involved in Naval Design. By Samuel J. P. Thearle, F.R.S.N.A., etc.

Two Volumes; Text and Plates. New York city: G. P. Putnam's Sons.

This book is designed to meet the requirements of both those who

possess but a moderate amount of mathematical knowledge as well as

of those who are much further advanced. Numerous formulae and rules

clearly stated will enable the former to perform without much

difficulty the ordinary routine of the draughting office, while

ample opportunity is afforded the latter to trace back the

processes from which these rules have gone forth. The book is

divided into six parts. Part I. embraces the calculations relating

to the forms and dimensions of ships. II. those relating to the

weights and centers of gravity of ships. Part III. refers to the

strength of ships. IV. and V. to their propulsion by sails and by

steam engines; while Part VI. treats of the calculations relating

to steering. An excellent book of plates and tables accompanies

the text.

KEMLO'S WATCH REPAIRER'S HANDBOOK: being a complete guide to the young

beginner in taking apart, putting together, and thoroughly cleaning

the English lever and other foreign watches, and all American watches.

By F. Kemlo, Practical Watchmaker. With Illustrations. Price $1.25.

Philadelphia, Pa.: Henry Carey Baird & Co.

This work will prove of great value to all in whom the curious

mechanism of clocks and watches has excited more than a passing

interest. None but skilled followers of the art have been allowed

to contribute to its pages, so that the practical worth of the

information given can be fully relied upon. A concise history of

timekeepers is followed by a clear and exhaustive description of

the English lever watch, which in turn is followed by articles

on cleaning, putting together, and the conditions necessary to

produce a good English watch. American watches deservedly engage

considerable attention. Papers on repairing watches, cleaning and

repairing clocks, and a short description of the necessary tools

complete the book.

RECENT PROGRESS IN SANITARY SCIENCE. By A. R. Leeds. Salem, Mass.:

Printed at the Salem Press.

This is a reprint of a paper read at the Lyceum of Natural

History, October 9, 1876, by the well known Professor of Chemistry

at the Stevens Institute.

WILLIAMS' TOURIST'S MAP AND GUIDE TO COLORADO AND THE SAN JUAN MINES.

Price 50 cents each. New York city: H. T. Williams, 46 Beekman street.

Two well edited publications, deserving the attention of travelers and

emigrants.

* * * * *

Scientific American, Vol. XXXVII.—No. 2. [New Series.], July 14, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 64 / 213 题