SCIENTIFIC AMERICAN December 12, 1874 This 16 page issue is in nice condition and contains illustrations of the latest inventions of the day including the following inventions: KEOKUK IA RAILROAD BRIDGE - PITTSBURGH PA CENTERFOLD OF STEEL INDUSTRY - HOT AIR BALLOON & much more. These illustrations also have text that goes along with them. Very interesting advertisements as well, back in the day when many of the normal things we use today were just being invented. Nice To Frame