APRIL 20 18671 OPENING OF THE PARIS EXPOSITION. MASSEY'S 'SHIP LEAKAGE ALARM. ANBELL'S FIRE DAMP INDICATOR. zyi Corropondtna. A Substitute tor the Try Square Wanted. .ir -, scientific american, 1867-04-20
APRIL 20 18671 OPENING OF THE PARIS EXPOSITION. MASSEY'S 'SHIP LEAKAGE ALARM. ANBELL'S FIRE DAMP INDICATOR. zyi Corropondtna. A Substitute tor the Try Square Wanted. .ir -, scientific american, 1867-04-20
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