THE POOR MAN'S REPRESENTATIVE. THE BISITLPHIDE OF CARBON 'AUXILIARY. AWARD OF PRIZES AT THE VIENNA EXPOSITION. THE PATENT CONGRESS AT VIENNA. LIGHTNING FEW PRACTICAL HINTS., scientific american, 1873-09-06
THE POOR MAN'S REPRESENTATIVE. THE BISITLPHIDE OF CARBON 'AUXILIARY. AWARD OF PRIZES AT THE VIENNA EXPOSITION. THE PATENT CONGRESS AT VIENNA. LIGHTNING FEW PRACTICAL HINTS., scientific american, 1873-09-06
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