Harper's Weekly 02/28/1880


THE HEKTOGRAPH.

New Process of Dry Copying—100 Copies from an Original
Writing in 20 Minutes.


The Ink can be washed off as from a common slate. It is the Best Copying Pad in the world, and the only
one that has any practical value. We guarantee satisfaction, and allow trial before payment.
HECTOGRAPH CO., 22 and 24 Church St., N. Y.
Also, 118 S. SEVENTH ST., PHILADELPHIA.44 BROMFIELD ST., BOSTON.155 MONROE ST., CHICAGO.



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