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Scientific American, Vol. 69, No. 21 (November 1893) (1893)
leaf 7
p- free circulation of air be- ports upon this T a roll- -— „-._ ~^*-r-- ■ tween the outrr and inner er formed of two per- coverings. This building forated balls connected contains the meridian cir- with each other by an cle, the chief instrument open ring, L, forming the to be used at present in… … bring the lamp from any eleven feet of water make story whatever, to utilize THE NEW DUDLEY OBSERVATORY. ALBANY, N. Y. twelve feet of ice, © 1893 SCIENTIFIC AMERICAN, INC.Gas · Patents · Air · Munn · Scientific American · Adapted · Largest circulation · Gas motors · Rand drill · Carbonic acid · Nitrous acid · Sewing machine · Storage battery · Horse power · Gas engine
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