A brass composed of 4.69 copper and 31 zinc is very suitable for hammering. A brass of 5.64 copper and 36 zinc is usefulfor brazing iron ; 6.75 copper and 25 zinc ; 7.5It copper, and 27t zinc.

Knobs and switches can make or break the aesthetic and tactile appeal of a project. Fine hi-fi hardware goes hard on these details, while cheap knock-off guitar pedals often go the other way. If yo… ...

This article was originally published with the title “ Evaporative Power of Brass, Copper, and Iron Boiler Tubes ” in Scientific American Magazine Vol. 13 No. 26 (March 1858), p. 204 doi:10. ...