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Scientific American, Vol. 64, No. 15 (April 1891) (1891)

leaf 3

An illustration from Scientific American, Vol. 64, No. 15 (April 1891), 1891, leaf 3
om a side wall, and in the employment AN IMPROVED ASTRONOMICAL MIRROR. of extra hooks. The wall plate, also, has backwardly The accompanying illustration represents details of projecting spurs or teeth, to be driven into the wall to construction whereby concave mirrors of long focus temporarily… … Couvectiou is designed to be aided by means of cur- FORTER'S HINGE FOR BLINDS, SCOTT'S PIPE HANGER.; ©1891 SCIENTIFIC AMERICAN, INC.

Patents · Munn · Scientific American · Colored · Vessels built · Hot water · Supreme Court · Post office · Illustration represents · Express money · Years ago · American supplement · Feet long

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