The Scientific American reference book : a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States; synopsis of the patent laws of foreign countries; rules and directions for Patent Office practice; forms for patents, caveats, assignments, licenses, and shop rights; hints on the value and sale of patents; how to obtain and introduce patents; the complete census of the United States, by counties and by states; the area of the states and territories; tables of the weights and measures of the United States; the principal mechanical movements, with 150 diagrams, together with engravings and descriptions of the condensing steam-engine, and valuable tables, calculations, problems, etc., etc. Illustrated with engravings

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