CHEMICAL LAMP. ^^g 



1. For obtaining oxigen gas, by means of the glafs retort, Defcrlption, &c, 

 from a mixture of four parts of finely powdered black oxide ^{^^'V^'^P~*'=** 

 of matiganefe, and three of concentrated fulphuric acid ; or 



by merely heating in a retort, hyper-oxigenized muriate of 

 potafh. 



2. For difeng^aging nitrogen, or azote, from animal fub- 

 /lances, by affjfing two parts of nitric acid of commerce, 

 diluted with an equal bulk of water, upon one part of mufcu- 

 lar flefh (a piece of beef or veal cut into fmall pieces), and 

 heating (he mixture to ebullition in a glafs retort. 



3. For obtaining Indrogen, fulphurated and phofphorated 

 hidrogen, in the iifual manner ; or for producing heavy car- 

 bonated hfdrogen by ftrongly healing, in a retort, a mixture 

 of three parts, by weight, of conceniraied fulphuric acid, and 

 one of fulphuric ether, or two of alcohol ; nitrous gas, by any 

 of the ufual proceffes ; gazeous oxide of nitrogen, by decom- 

 pofing nitrate of amm.onia by heat in a retort; fulphureous 

 acid gas, by caufing four parts of concentrated fulphuric a' id 

 to ad on one of lump-fugar, affifting the aftion of the mixaire 

 in the retort by heat; muriatic acid gas; oxigenized muriatic 

 acid gas and carbonic acid gas, according to any of the ufual 

 methods; ammoniacal gas, by heating in a retort a mixture 

 of two parts of finely powdered lime and one of muriate of 

 ammonia. 



4. For the difiillation of nitric, muriatic, oxi-muriatic, ace- 

 tic, oxalic, arfenic, pruffic, fuberic, mucous, and camphoric 

 acids, according to the methods recommended by fyfiematic 

 writers, 



5. For the produ6lion of metallic, earthy, and alkaline ful- 

 phurets; fuch as fulphuret of potafli, foda, barytes, ftrontia, 

 ammonia, iron, copper, tin, mercury, ^c. 



6. For performing the analyfis of ores of gold, filvcr, cop- 

 per, lead, zinc, tin, Sfc, and for examining mineral and native 

 falts, earth and ftones, according to the methods pointed 

 out in the " Pradical Etiay on the Analy fis of Minerals," and 

 for a variety of other operations, too numerous to be detailed. 



Old Compton-Street, Soho, 

 July 18, 1804. 



On 



