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Scientific American

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Pacific Press Publishing Company · Mountain View, California · Mar 6, 1907

FromSigns of the Times, Vol. 33, No. 10.

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Scientific American

60 YEARS' EXPERIENCE PATENTS TRADE MARKS DESIGNS COPYRIGHTS &c.
60 YEARS' EXPERIENCE PATENTS TRADE MARKS DESIGNS COPYRIGHTS &c.
Anyone sending a sketch and description may quickly ascertain our opinion free whether an invention is probably patentable. Communications strictly confidential. HANDBOOK on Patents sent free. Oldest agency for securing patents.
Patents taken through Munn & Co. receive special notice, without charge, in the

Scientific American.

A handsomely illustrated weekly. Largest circulation of any scientific journal. Terms, $3 a year; four months, $1. Sold by all newsdealers.
MUNN & Co. 361 Broadway, New York
Branch Office, 625 F St., Washington, D. C.