On the conjlttuent Parts of Azot, 33f 



the Infide, and when the fteam is made to pafs through a 

 tube of glafs or any other fubftance. 



a. When water is boiled in a glafs retqrt which contain* 

 argil or alumine, and the fteam is m^dg to pafs through » 

 tube of glafs or of any pther fubftance, 



3. When com mqii water is boiled in a glafs retort, an4 

 the fteam js made tp pafs through an earthen tube. 



4. When common water is boiled in a gUfs retort, and 

 the fteam is made to pafs through a glafs ^ube which con- 

 tains argil or alumine. 



5. When an earthen tube, filled with water, is inclofed 

 in a larger one of glafs, with fand between them ; and the 

 tube of glafs in another of iron, with fand between them, i^ 

 ^he like manner, and thp whole is expofed to the fire*, 



6. When water is boiled in a glafs retort containing lime, 

 and the fteam of it is made to pafs through 9. tube of glafs 

 pr of any other fubftance, 



7. When water is bailed '-^^ a glafs retort containing 

 pounded quartz or filex, and the fteam is made to pafs 

 through a tube of glafs or of any other fubftance. 



8. The firft experiment will equally fucceed \vhen the 

 earthen retoft i§ covered or^ the Qutjide with a nietalli9 

 glazing, 



9. The third experimetit will alfo fucpeed when the earthen 

 tube is covered on the outjide with a metallic glazing. 



10. The fourth experiment will fuccepd, when, inftead of 

 argil, the tube is filled with lime or pounded quartz. 



Qnly fteam of water, but no azotic gas^ is obtained j 



If. When water is boiled in a glafs retort, and tl^e vapour 

 is made to pafs through tubes of glafs or porcelain. 



a. When water is boiled in an earthen retort covered on 

 the infide with a metallic gl^izing, and the (teain is n^ade tw 

 pafs through tubes pf glafs or porcelain. 



3. When water is boiled in a glafs retort fi.lled with pound- 

 ed glafs, and the ftearn is made tp paf? tjirough tiibes of glafa 

 or porcelaiq, 



* This is Gne of Prieftiey's experiments, which I have not repeated. 

 See his Experiments and Obfervations 9^ differeixt Kipds of A^r^ Bif' 

 •!('n^i)iwi 1790, Vol. II. p. 41S. 



X X 2( Gener^ 



