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Scientific American, Volume XLIII., No. 25, December 18, 1880

ADVERTISEMENTS.

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Inside page, each insertion—75 cents a line.

Back page, each insertion—$1.00 a line.

(About eight words to a line.)

Engravings may head advertisements at the same rate per line, by measurement, as the letter press. Advertisements must be received at publication office as early as Thursday morning to appear in next issue.

The publishers of this paper guarantee to advertisers a circulation of not less than 50,000 copies every weekly issue.

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