THE LATEST SUBMARINES OF THE UNITED STATES NAVY. Home-Made Experimental Apparatus THE MIDDLE WEST NUMBER To moat Americana the Mississippi Valley and the rich country that spreads outward from either of its shores is farmland-a country which may well be regarded not only as the granary of the United States but of a large portion of the world as well. The Middle West is more than this. It is a country of wonderful engineering development and achieve ment wonderful because of the enormous scale on which its industrial works have been planned. On December th 1909 the SCIENTIFIC AMERICAN will

THE LATEST SUBMARINES OF THE UNITED STATES NAVY. Home-Made Experimental Apparatus THE MIDDLE WEST NUMBER To moat Americana the Mississippi Valley and the rich country that spreads outward from either of its shores is farmland-a country which may well be regarded not only as the granary of the United States but of a large portion of the world as well. The Middle West is more than this. It is a country of wonderful engineering development and achieve ment wonderful because of the enormous scale on which its industrial works have been planned. On December th 1909 the SCIENTIFIC AMERICAN will

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THE LATEST SUBMARINES OF THE UNITED STATES NAVY. Home-Made Experimental Apparatus THE MIDDLE WEST NUMBER To moat Americana the Mississippi Valley and the rich country that spreads outward from either of its shores is farmland-a country which may well be regarded not only as the granary of the United States but of a large portion of the world as well. The Middle West is more than this. It is a country of wonderful engineering development and achieve ment wonderful because of the enormous scale on which its industrial works have been planned. On December th 1909 the SCIENTIFIC AMERICAN will issue a number devoted entirely to this Middle West region a number which will set forth broadly and lucidly not only the agricultural interests of that region but also those larger engineering undertakings which are destined to transform the Middle With that object in view the Middle West Number will publish articles on the following subjects: grain elevators at work. Order from your newsdealer or from Household Bills Paid Every Month for Life by Monthly Income Checks of The Prudential Newest Monthly Income Policy Dept. 121 Send this coupon for full NEWARK N. J. JOHN F. DRYDEN President Occupation My Age Is Beneficiary's Age You Need This Policy Whether You Are Now Insured or Net are made in 17 different degrees of hardness and softness GB' to 9. L & C. HARD TMUTH Est. 1790 34 E. 23d St. New York Please mention the SCIENTIFIC AMERICAN when writing to advertisers, -1909-10-23