l En- 361 Broadway New York. gineer. Giving Tables, Rules, and Formulas pertaining valuable and interesting paper by F. H. Alcock. Con- to Mechanics, Mathematics, and Physics, Architecture, tained in SCIENTIFIC AMERICAN SUPPLEMENT NO. Masonry, Steam Vessels, Mills, Limes, Mortars, Cements, etc.… … and Manufactures at home and abroad are represented ROCHESTER N.Y. and described in the SUPPLEMENT. POWER OR METAL. Price for the SUPPLEMENT for the United States and SLATE ROOF COVERINGS.--BY JOHN All sizes. Catalogues free. Lathes on trial. anada, $5.00 a year, or one copy of the SCIENTIFIC AM-…
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