Seientific American. NovEMBER 19, 1892.] 327 Manufacture of Alum in India, THE LIFE-SAVING ROCKET GRAPNEL. … into square earthen vats about 10 Very many of the plans lacked nov- ft. long and 2 ft. deep. Water is elty. LIFE-SAVING ROCKET GRAPNEL. The work of deciding to whom then slowly added until its level is nearly up to that of the shale. The soaked portion | the prize should be awarded was intrusted…
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