14^ ANALYSIS OF ABlMONrA. 



red, was ei;;^ht cubical inches. 10-25 of it detonated wHh 

 3-5 of oxigen diniinisiied to O'H. 

 5)j^_ The second portion eqiiolied five cubical inches ; 9-J- of 



this, with five of oxigen, leit a residuum of 3|. 

 Siidt Of the third portion, -2 cubical inches and 4- came overi 



9 of it, detonated with 5 of oxigen gas, left a lesiduum of 

 1-4, 



'J he iron tube and the adaptors contained, at the end of 

 the experiment, as was proved by coolit;g and the admission 

 of hidrogen, 2-3 cubical inches of gas, which appeared ot the 

 same com position as the third portion. Nearly 7 grains of 

 potassium were recovered. 

 Sk&ults. -^ comparison of these results, with those stated in thes 



preceding page, will fully prove, that there is a much smaller* 

 proportion of nitrogen to the hidrogen, in the case in which 

 the olive-colomed substance is distilled with potasc^iuui thaa 

 in the other case, and there is likewise a larger quantity of 

 potassium converted into potasli. 



The loss of nitrogen, and the addition of oxigen to the 

 potassium, are sufficiently distiiict in both processes; a d 

 the want of a correspondence between these results, and 

 those of the ex per iment4v". tailed in page 65*, are not greater 

 than might be expected, when all the circunistances of tbe 

 ©peration are considered. In the instance, in which a dou- 

 ble quai^.tity of potassium was employed, piore potash must 

 have been formed from- the oxigen ef the common air in the 

 tubes ; and the fusible substance, in passing through the at- 

 mosphere, absorbs in different cases different quantities o^f 

 oxigen and of moisture ; during the intervals of the removal 

 ©f the different portions of gas likewise, some globules are 

 lo.-t, 

 Iffect^ofmore I" instances when the heat has been more rapidly raised, 

 rapidly raising J l);)ve generally found more potassium destroyed, and less 

 ^yj.g_ Hltrogen in proportion in the aeriform products. In such 



caees likewise, the loss of weight has been much greater; 

 the gasses have been always clouded, and the adaptors, after 

 being exposed to a moist air, emitted a sm^ll of ammonia; 

 from which it seems likely, that small quantities of the dark 



* Journal, vol. XXII I, p. 253. 



gray 



