Oh tht Ctmpfijilion »f Ateti, 167 



tjcired to ralfe ont body of water from refervoir C into refervoir E, by means of the 

 defcent of another body of water through B, a communication muft be made into B, inde^ 

 pendant of the pipe 5 and cock c, viz. through a pipe, cock, and funnel (or refervoir)^ 

 reprcfented by the dotted lines, communicating with B, near the pipe and cock 5 and c,- 

 and then they are to be ufed in lieu of pipe 5 and cock c. 



A Memoir t in which the Ouefiion is examined, whether Jzote he afimple or compound Bodyf 

 By Christopher Girtanher, Dodor of Phyjic at Gottingen. 



(Concluded from page l/\o.J 



I 



PROPOSE, in a particular work upon azote, to give a detail of the numerous expe- 

 liments which I had made to difcover its nature : I fhall confine myfelf at prefent to give a 

 general outline of thefe experiments, as well as of the inductions which I have thought 

 might be drawn from them. 



I think myfelf intitled, therefore, to aflSrm without felf deception, that azote gas is 

 ©btalnerf.. 



1. When water is boiled in an earthen retort not glazed within, and the vapour Is made 

 to pafs through a tube of glafs, or other material ; 



2. "When water is boiled in a retort of glafs containing clay or alumine^ and' the vapour 

 is made to pafs through a tube of glafs, or other material ; 



3. When water is boiled alone in a retort of glafs, and the vapour is made to paft 

 through a tube of pipe clay ; 



4. When water is boiled alone in a glafs retort, and the vapour ismadie to pafs through 

 a glafs tube containing clay or alumine ; 



5. When an earthen tube is filled with water, and this tube is included in a larger tube 

 of glafs with fand between them, and this tube of glafs in tube of iron alfo with fand be- 

 tween them, and the whole is expofed to ignition * ; 



(5. When water is boiled in a glafs retort containing lime, arid the vapour is pafled 

 through a tube of glafs or other material ; 



7. When water is boiled in a glafs retort containing pounded quartz, or files, and the 

 vapour is pafled through a tube of glafs, or other material ; 



8. Experiment x fucceeds equally when the earthen retort Is coated externally with a 

 metallic glaze : 



# This experiment, which I have not repeated, is given by Prieftley, in his experiments and obfervatloaj 

 «n diiFei ent kipd; of air. Birmingham, 1790, vol. ii. page 41 3* 



9. Experl-, 



