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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."