Scientific American Volume 04b Number 46 (August 1849) . CO. 60 Nassau st. ADiRONDAC AMERICAN CAST STEEL. Anew and very superior article fully equal toany European Steel in the market, for sale at theCompanys Warehouse. QUINCY & 8m* 81 John St. New York. TURNING LATHE FOR SALE. WE have on hand a superior Lathe, well finishedand entirely new, with all the modern im-provements, centre and drill chucks, one face plate,7 inch centres, 5 feet length of bed, with slide rest,&c, which we will put upon shipboard for the lowsum oi $125. Any person wishing the above ma-chine can enclose a
Scientific American Volume 04b Number 46 (August 1849) . CO. 60 Nassau st. ADiRONDAC AMERICAN CAST STEEL. Anew and very superior article fully equal toany European Steel in the market, for sale at theCompanys Warehouse. QUINCY & 8m* 81 John St. New York. TURNING LATHE FOR SALE. WE have on hand a superior Lathe, well finishedand entirely new, with all the modern im-provements, centre and drill chucks, one face plate,7 inch centres, 5 feet length of bed, with slide rest,&c, which we will put upon shipboard for the lowsum oi $125. Any person wishing the above ma-chine can enclose a draft for the amount, and it willbe shipped without MUNN 8c CO ,j?28 HITTINGER & COOK BLACKSMITHS, Shipsmiths, and Machinists.—Fence and Balustrade Woik. All kinds of IceTools constantly on hand. Ice and Express Wagonsbuilt to order. Also, Trucks and Cartsr all kinds ofRailroad Work, Mill Work, Shafting, &c. Ch&mber st, near the Square, Charlestown, 3m* ) 1849 SCIENTIFIC AMERICAN, INC 368 Scientific 2Unertam. Nitrogen, Laughing Gas. Our atmosphere is composed of two gases,nitrogen and oxygen. The latter is the supporter of life, the former has been called azote,from the Greek, to signify its unfitness for sup-porting animal lite. Nitrogen will combinewith oxygen in various proportions, hencethe mixture of the atmosphere has been cal-led mechanical, because it combines withoxygen in other proportions and forms nitricacid. Nitrogen gas may be obtained by equalweights of sulphur and iron filings made intoa paste with water, and placed in a shallowdish, floating on water, and a bell jar full otatmospheric air be inverted over it. In thecourse of a few days, it will be found that thewater has risen about one fifth way up thejar, the remaining gas being nearly pure ni-trogen—the oxygen having been all absorbedby the mixture. Nitrogen gas may be obtained from a pieceof lean flesn meat, beef for example, whichmay be put in a retort along with very dilutenitri
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