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Scientific American, Vol. 58, No. 9 (March 1888) (1888)

leaf 4

An illustration from Scientific American, Vol. 58, No. 9 (March 1888), 1888, leaf 4
om which section at one side at right angles to the line of the cen- with a lens; but for bromides, where the detail re- extends an arm, in the outer end of which is loosely tral section. The opposite end of the tube has a small quired is not so great as for silver prints, very satisfac- held a… … must be carefully removed. A simple method of avoid- ST. JOHN'S SPIRIT LEVEL AND'INCLINOMETER. BROWN'S CAR COUPLING. ing the burr is to burn the hole in paper with a red hot on the other drawhead. The under set of teeth on the needle. connection with the use of a small bubble, facilitate rack mesh…

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