MANUFACTURE OF ARMOR PLATES--HAMMERED AND ROLLED. LARGE EUROPEAN GUNS AND POWDER. PHOTOGRAPHING FROM BALLOONS IN MILITARY RECONNOISSANCES. other officer who may chance to see these remarks the propriety of calling upon the Photographical So TESTING THE STRENGTH OF ELECTRICAL CURRENTS. PHILOSOPHY OF PROJECTILES. the country as that of improvements in gunnery.' sight., scientific american, 1862-05-03
MANUFACTURE OF ARMOR PLATES--HAMMERED AND ROLLED. LARGE EUROPEAN GUNS AND POWDER. PHOTOGRAPHING FROM BALLOONS IN MILITARY RECONNOISSANCES. other officer who may chance to see these remarks the propriety of calling upon the Photographical So TESTING THE STRENGTH OF ELECTRICAL CURRENTS. PHILOSOPHY OF PROJECTILES. the country as that of improvements in gunnery.' sight., scientific american, 1862-05-03
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