266 



MB. JOHN LEIGH ON THE CHEMICAL CHANGES 



1. GASEOUS. 



Hydrogen H. 



Light Carburetted Hydrogen H. 4 C. 2 



Olefiant Gas H. 4 C. 4 



Volatile Hydro-carbon H. 6 C. 6 probably 



Benzole C. 12H.6 



Carbonic Oxide C. O. 



Cyanogen C. 2 N. 



Sulphuretted Hydrogen H. S. 



Ammonia H. 3 N. 



Aqueous Vapour H. O. 



Sulphurous Acid S. O. 2 



Hydrochloric Acid H. CI. 



Carbonic Acid ....'..V«;..'..i...... C. O. 2 



Sulphuret of Carbon...........'..'...'.'..:..'....... 0. S. 2 



Nitrogen N. 



2. AQUEOUS. 

 Water holding in solution 



Carbonate of Ammonia. 

 Hydro-sulphate of Ammonia. 

 Prussiate of Ammonia. 

 Sulphate of Ammonia. 

 Muriate of Axomonia. 



3. OILY. 



/■Benzole \ C. 12 H. 6 



Liquid-5 Toluol VNeutral C. 14 H: 8 



(Cumol ) C. 18 H. 12 



Aniline C. 12 H. 7 N. 



Picoline C.12 H. 7 N. 



Leucoline C. 18 H. 8 N. 



Hydrate of Phenyle C. 12 H. 6 O, 2 acid. 



Naphthaline C. 20 H. 8 



Paranaphthaline..!. C. 30 H. 12 



Pyren C. 16 H. 3 



Chrysen C.12 H. 4 



Various undescribed oils. 



Of these oily products, which are all contained in the tar, 

 it will be perceived that only one contains oxygen, and this 

 possesses acid properties. The first thifiee are neutral. 



Liquid 



Solid • 



Constituents 

 of Naphtha. 



Const!- 

 tnents 



of 



heavy 



oU of 



tar. 



