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Scientific American, Vol. 20, No. 23 (1869) (1869)

leaf 7

An illustration from Scientific American, Vol. 20, No. 23 (1869), 1869, leaf 7
e composition is in a melted state. only is it a staple article of dict through most of the Southern cover the entire ground,all of the above principles being taken After the copper is melted, and 4 or 5 lbs. of tin have been States, but it also isin demand, to a less extent, throughout | added,… … furnished with a diaphragm, I, provided has sufficiently cooled remove the former. with an opening to allow the grain to pass A shorter method may be adopted when after being sufficiently beaten. The object the work is light enough to handle quick Fig. 2, a view of the under side, inclined, to show…

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