MORE 400 Without Stropping At Less Than 1-4 Cent A Shave Think what this meant to the man who tortured himself for years with the old style razors before he wrote us. DOUBLE EDGE1) . Awarded Gold Medal for Merit at St. Louis Exposition 1904. 'Current Wheels; Their Use In Irrigation' MVNN 41 COMPANY 361 New York SCIENTIFIC AMERICAN tions of readers and correspondents is cryst allized in this book which has been in course of preparation for months. It is indispens able to every family and business man. It deals with matters of interest to everybody. more complete and more exhaustive


MORE 400 Without Stropping At Less Than 1-4 Cent A Shave Think what this meant to the man who tortured himself for years with the old style razors before he wrote us. DOUBLE EDGE1) . Awarded Gold Medal for Merit at St. Louis Exposition 1904. 'Current Wheels; Their Use In Irrigation' MVNN 41 COMPANY 361 New York SCIENTIFIC AMERICAN tions of readers and correspondents is cryst allized in this book which has been in course of preparation for months. It is indispens able to every family and business man. It deals with matters of interest to everybody. more complete and more exhaustive than anything of the kind which has ever been attempted. American Refer been compiled after gauging the known wants of thousands. It has been revised by eminent statisticians. Information has been drawn from over one ton of Government reports alone. It is a book for everyday reference- more useful than an en cyclopedia because you will find what you want in an instant in a more condensed form. and copyrights is a thorough one and aims to give inventors proper legal aid. The chapter on manufactures deals with most interesting figures admirably presented for reference. The chapter dealing with Bechanicaliiovements contains nearly three hundred illustrations and they are more reliable than those published in any other book - they are operative. Weights and measures occupy a considerable section of reference. Sixty years of experience alone have made it possible for the publishers of the Scientific American to present to the pur chasers of this book a remarkable aggregation of information. The very wide range of topics covered in the 'Scientific American Reference Book' may be inferred by examining the table of contents sent free on request. Remit $ the book will be promptly mailed. Send to-day. Scientific American Office 361 Broadway 14. New Uses of Electricity., 1905-01-28


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