reve ee rn eae Ca 214 A 2.1 A_8. 6.2. 2 2.2.2 2.2.2. SD oo- 5—2-S- 8 8 8-S d-~s (Entered at the Post Office of New York, N. Y., as Second Class matter. Copyrighted, 1892, by Munn & Co. A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTURES, Vol, LXVI1.—No,… … = = = > SS — g w NES COLUMNS WITH ALUMINUM.—ISee p. 261.)
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