ACCOUNT OF A NEW EUDIOMETER. 0/1 



The divisions are obtained by a small measure, made from and graduating 

 a glass tube sealed at the end, and cut off exactly to the hun- 

 dredth part of a cubic inch, equal to 34'2 grains of mercury, 

 which, being ground flat, is stopped by a piece of plate-glass, 

 and the divisions marked by the diamond, upon the introduc- 

 tion of each hundredth part of mercury into the measure M. 



The tube T is divided into tenths of the measure M, or Mode of gra. 

 thousandth parts of a cubic inch. This is done by measur- du £ thl S ^ 

 ing one hundredth part of a cubic inch into the tube, and di- 

 viding it into ten parts,markingthe divisions with fluoric acid, 

 or black enamel. 



To prove the accuracy of the instrument, I shall proceed to 

 relate a few experiments made with it. 



The elastic bottle being filled with the solution of sulphate Experiment* 



of iron impregnated with nitrous gas, and the measure with t0 P rove »» 



, ... -.ill Al • • ■• accuracv. 



atmospheric air, they were united, and by gentle injection 



tVW were absorbed. 



If the experiment is made hastily, the impregnated solu- 

 tion loses a portion of its nitrous gas, which must be again 

 absorbed by a solution of green sulphate of iron. 



For ascertaining the purity of nitrous gas, the bottle may 

 be charged with the solution of green sulphate or muriate of 

 iron. 



For carbonic acid gas, with lime or barytic water. 

 For oxigen gas*, with the solution of green sulphate of 

 iron impregnated with nitrous gas. 



For sulphuretted hidrogen gas, a solution of nitrate of sil- 

 ver was put into the elastic bottle, and sulphuretted hidro- 

 gen gasf into the graduated measure. Upon the first injec- 

 tion, the solution took a black flocculent appearance, and a 

 considerable portion of the gas was absorbed. After re- 

 peating the process as before mentioned, the residuum was 



TTSTTTo* 



The instrument may be likewise generally applied to the Mixed gasses 

 analysis of mixed gasses. ma y be ana * 



I have been able completely to separate the carbonic acid 

 gas from the sulphuretted hidrogen, by a solution of the ni- 



* Obtained from oximuriate of potash by heat. 



f Obtained from sulphuret of potash by diluted muriatic acid, and col- 

 lected and preserved with the greatest care. 



trate 



