the PETROLEUM AS FUEL.—A_ DISCUS- memory of Alexander Hamiiton, Henry C. Carey, a week in your own town. Terms and $5 outfit Stephen Colwell—the Political Economists of the New sion of the comparative values of coal and petroleum us by R. Ball & Co., Worcester, Mass. Send for Catalogue. free.… … Messrs. Munn & Co., in connection with the publica- Illustrated. 8vo. NEW YORK BELTING AND PACKING COMP’Y. tion of the ScIENTIFIC AMERICAN, continne to examine eT he above or any of our books sent by mail at thepub- li ation prices to any address im the world. Improvements, and tc, act ae…
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