Analysis of a mineral -vvatrr. 273 



42. Grains by weight 22045 = 85*973 cubic inches nearly Air expelled., 

 .of the fresh mineral water were poured into a flask, and se- 

 curely luted to a tube terminating under a graduated jar 



filled with quicksilver. The quantity of atmospheric air 

 that was contained above the water in the fiask and in the 

 tube was ascertained to be 9*5 cubic inches. The thermo- 

 meter was at 47 # of Fahrenheit, and the barometer 29*7- 

 The water was boiled for about half an hour. When the 

 apparatus was cold, the whole of the air in the flask and 

 tube was transferred into the graduated jar. When reduced 

 to the same temperature and barometrical pressure as before 

 the operation of boiling, it measured ltrl cubic inches. 



43. The gas thus collected was washed in a solution of Tested with 

 superacetate of lead, until no farther absorption took place, i e J a P d e [ acetale of 

 The quantity absorbed was 1*95 cubic inches. 



44. The gas was then exposed to the action of fresh made lime wat« : 

 lime water, until it underwent no farther diminution of 



bulk. The quantity absorbed by the lime water was 2*1 

 cubic inches. 



45. The residual gas amounting to 12*05 was next treated and sulphuret 

 with a solution of sulphuret of lime, that had been satu- of hme - 

 rated with azote. The quantity of oxigen absorbed was Iff 



cubic inches. 



The 9*5 cubic inches of atmospheric air contained in the 

 apparatus consisted of 7*5 4- cubic inches of azote, and 

 2 — . cubic inches nearly of oxigen. The whole of the oxi- 

 gen indicated in 45 was contained therefore in the atmo- 

 spheric air. The small deficiency of oxigen appears to have 

 been produced by that quantity having combined with the 

 black oxide of iron, which during the experiment fell down 

 in the form of red oxide. 



2*65 cubic inches of azote therefore were given out by the 

 quantity before stated of the mineral water. 



46. 88180 grains by weight zz to 343*9 cubic inches of The water eya* 

 the fresh mineral water were boiled for an hour or more and P orated * 

 filtered. They were then evaporated to about 30 cubic 



inches, when the muriate of soda began to crystallize. The Muriate of 

 water was then filtered again, and the small quantity f f oda cr y stal " 

 precipitate that was then obtained, and which from a pre- 

 Vol. XXII— April, 1309. T vioui 



