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Aids to the Art of Drawing

An Improved Camera Lucida

Pneumatic Photographic -Shutter

By W. Barry

Photographic Engraving

By J. Waterhouse

Millers and their Men

How to make a Camera Lucida in Ten Minutes

A Horse's Motion Scientifically Considered


Thomas Grubb, F.R.S

The Royal Society

Aluminum at the Paris Exhibition

Fireproof Paper and Ink for Documents

Recent Arctic Explorations

Galvanic Batteries

By Geo. M. Hopkins

Actual Costs of using Electric Lights

The Divisibility of the Electric Light

Ammonium Nitrate

By Spencer Pickering

Outlines of Chemistry

By Henry M. Mcintire

H.M.S. Northampton

Steam for small Boats

Artesian Wells

Rotary Condenser and Feed Water Heater

Peruvian Antiquities

By E. R. Heath


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    January 11, 1879

    20% Sitewide for President's Day