The Effect of Tobacco on Children. Centrifugal Force. Proposed $50000 Prize for a Gas Engine. SILKWORMS AND MOTHS. Coal Gas and Water Gas. 1MULBERRY SILK WORM AND MOTH. 2SOUTH AMERICAN SILK SPINNER. 8CHINESE SILK SPINNER. 4 AILANTITS SILK SPINNER., scientific american, 1883-07-21
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