Notes on Foreign Inventions

1859 Scientific American  
& Grim. effective are9.S on opposite sides. The high.pressure cy-crushed by stamps, and passes three sieves. The siftings shaw, of London, have patented an ingenious fire-alarm linder receives steam direct from the boiler during a part of the first sieve are put under the stamps again. The and indicator. It consists of a small cylinder of thin of the stroke, and the steam then finds egress through a sifting of the second sieve is as fine as the grain of wheat, metal, to contain atmospheric air.
more » ... in atmospheric air. Within is a flexible port and enters the end of one of the other cylinders and and the total sifting is delivered to the ore-mill, Aras diaphragm made perfectly air-tight. The expansion or I
doi:10.1038/scientificamerican11121859-318 fatcat:scxijkooyzdxplbvcu4bdhdg5m