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Scientific American, Vol. 37, No. 3 (1877) (1877)
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thus constitute a class of mid- dlemen between producer and the class above ering the interior of tea chests. This, how- mentioned. ever, is produced in China by simple casting As lead is made into sheets by rolling, the and pressure. The operation is performed by MELTING THE LEAD. first process to… … [Continued on page of levers whereby 34.] the cake is pushed © 1877 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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