Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 617
imental work, a type of lan-tern was found which in cheapness, compactness, generallygood design, finish and efficiency, is superior to many thatwere examined. Still it has a serious defect, that is, con-siderable spherical aberration ; but this can be easily reme-died by replacing the front lens…
Physics · Lantern projection · Electric apparatus and appliances
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