DECEMBER 28 1878 THE NATIONAL OBSERVATORY. AN AMENDMENT TO DISCOURAGE INVENTION. THE TUNNEL UNDER THE BRITISH CHANNEL. PROTECTION TO BANKS. THE HOG CHOLERA COMMISSION. Manes' Revolving Furnace., scientific american, 1878-12-28
DECEMBER 28 1878 THE NATIONAL OBSERVATORY. AN AMENDMENT TO DISCOURAGE INVENTION. THE TUNNEL UNDER THE BRITISH CHANNEL. PROTECTION TO BANKS. THE HOG CHOLERA COMMISSION. Manes' Revolving Furnace., scientific american, 1878-12-28
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