tion to Philadelphia. continues to maintain Its high reputation for excellence, 12 North Clark N. W. Cor. 9th M,ining and Military Engineering; Pyroxyline or M. EHRET, JR. & CO. 22U Walnut Street. 1 Street. ,| and Olive Sts. and enjoys the largest circulation ever attained by any Gun Cotton, the… … A Course of Six Lectures, with one on Platinum. containing sixteen large pages. The Sciicntipic Abi- By Michael Faraday. Edited by William Crookes. .85 ERiCAN SupPLKMicNT is published Weekly, and Includes a very wide range of contents. It presents the most re- Fergusson.—A HISTORY OF ARCHITEC-…
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