On phlogiston. 473 



Thirty-two ounce meafures of oxygenous gas, obtained 

 from red lead and the fulphuric acid, and fixty-four mmcc 

 meafures of hydrogenous gas, procured from the borings 

 of cannon and diluted fulphuric acid, both of which had 

 been well wafhed in lime water, were introduced into a 

 copper tube, and decompofed by the ekitric fpark. About 

 one ounce of water, remained- in the tube, which after 

 the explofion, was filled with an immenfe number of hue 

 particles of matter, and which being colledlcd upon a iil- 

 ter and analyfed, turned out to be copper. 



The water was of a pale blue colour, and did not turn 

 litmus paper red. Evaporated to drynefs, it yielded one 

 grain and a half of the nitrate of copper. 



This experiment was repeated with the fame kind ot 

 airs, and gave the fame refult. 



Trying the hydrogenous gas from muriatic acid and zinc, 

 and oxygenous gas, from red lead and fulphuric acid in the 

 fame proportions, no difference took place. 



Increafmg the quantity of oxygenous gas to forty ounce 

 meafures, and reducing the hydrogenous gas to fifty-fix 

 ounce meafures, and excluding the water, nitrous acid 

 was produced. 



Repeating this experiment over diftilled water, with 

 the lame quantity of oxygenous gas, obtained from red 

 precipitate, and hydrogenous gas from malleable iron and 

 diluted fulphuric acid, the fame quantity of nitrous acid 

 was produced, and no muriatic acid was formed, as ap- 

 peared by the acid not precipitating a folution of filver in 

 nitric acid. 



Introducing into the tube, thirty-two ounce meafures 

 of azotic gas, forty of oxygenous gas, obtained from the 

 fulphuric acid and manganefe, and twenty-four of hydro- 

 genous gas, from malleable iron by the diluted fulphuric 

 acid, the quantity of nitric acid did not appear to be in- 

 creafed. 



3 Q_ Repeating 



