By Geo. M. Hopkins

Seventeenth Edition, Revised and Enlarged. 840 Pages. 800 Illustrations. Elegantly bound in Cloth. Price, by mail, postpaid, $4.00; Half Morocco, $5.00.

This is a book full of interest and value for teachers, students and others who desire to impart or obtain a practical knowledge of Physics.

This splendid work gives young and old something worthy of thought. It has influenced thousands of men in the choice of a career. It will give anyone, young or old, information that will enable him to comprehend the great improvements of the day. It furnishes suggestions for hours of instructive recreation.

What the Press says of "Experimental Science."

"Mr. Hopkins has rendered a valuable service to experimental physics." - Evening Post.

"The book is one of very practical character, and no one of a scientific turn of mind could fail to find in its pages a fund of valuable information." - Electric Age.

"The work bears the stamp of a writer who writes nothing but with certainty of action and result, and of a teacher who imparts scientific information in an attractive and fascinating manner." - American Engineer.

"It should be found in every library." - English Mechanic.

"The book would be a most judicious holiday gift." - Engineering and Mining Journal.

Mr. Thomas A. Edison says: "The practical character of the physical apparatus, the clearness of the descriptive matter, and its entire freedom from mathematics, give the work a value in my mind superior to any other work on elementary physics of which I am aware."

Prof. D.W. Hering, University of the City of New York, says: "I know of no work that is at the same time so popular in style and so scientific in character."

Prof. W.J. Rolfe, of Cambridgeport, Mass., writes: "The book is by far the best thing of the kind I have seen, and I can commend it most cordially and emphatically."

Hundreds of cordial recommendations from eminent Professors and Scientific men.

MUNN & CO., 361 Broadway, New York.