. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . irfly-tracks. To certain other classes of inquirers the following hintsmay be useful: The best washing-machines, the best straw-cutters, the best churns, the best brick-machines, the bestengines, the best sewing-machines, the best of every thingiu the mechanical line, is advertised and illustrated in TheScientific American, and the address of the p
. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . irfly-tracks. To certain other classes of inquirers the following hintsmay be useful: The best washing-machines, the best straw-cutters, the best churns, the best brick-machines, the bestengines, the best sewing-machines, the best of every thingiu the mechanical line, is advertised and illustrated in TheScientific American, and the address of the parties havingsuch things on sale is there given. Write directly to themfor the information you want, and spare us. If you cannotat first find what you desire, read the back numbers ofThe Scientific American. Do not expect us to do thework for you unless you send a small remittance. To find the area of an ellipsis, multiply the long diam-eter by the short diameter and by .7854; the product willbe the area. Never relate your misfortunes, and never grieve over whatJ you cannot prevent. To find the area of a circle, multiply the square of thediameter by the decimal .7854. Or multiply the circum-ference by the radius, and divide the product by WHERE TO GO FOR PATENTS. 107 [From The Scientific American.] RELATIIfG TO PATENTS. T may be well for partieswho are interested in newinventions to remember thatour firm of Munn & Co. havetaken out far more patents,and have, therefore, hadmuch greater experience inthe profession, than any otheragency in the world. Thosewho confide their business tous may therefore rely uponhaving it done in the bestnanner on the most mod-erate terms. In addition to these advantages, we make it a general ruleto assist the interest of our clients by giving publicity inthe form of editorial notices, of all the new and meritoriousinventions that are patented through our agency. The factthat we have carefully studied these improvements duringthe process of prepa
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