Scientific American, Vol. 33, No. 9 (1875)
Scientific American volume 33, number 9 from 1875 is a weekly American periodical for a general readership of inventors, engineers and mechanics, printed in New York. Its pictures are wood-engraved line illustrations of machinery, instruments and equipment, with figure numbers and captions, showing clean technical drawing a designer could draw on for mechanical diagrams and labelled schematics.
