Dr. E. J. Mills on Cumulative Resolution. 



495 



According to those Tables, the different amnionic carbonates 

 may be produced either by deammoniating diammonic car- 

 bonate, or by decarbonating hydroammonic carbonate. Wo 

 have also to note the relations 



n + 1 

 n 



2n 



and 



i\r 2 



n+1 

 2. 



These relations are graphically expressed by rectangular 

 hyperbolic curves. A drawing of the equation to r 2 is here 



i 5 S»S 



given, where the dots represent portions, at present un- 

 known, of the resulting curve. Considered as far as the first 

 cumulate, all the values of r 2 lie between ■— 1 and + 2. 



3. Ammonic Sulphides. — Aqueous solutions of these bodies 

 are gradually converted by exposure to air into ammonia, 

 water, and sulphur. 



wNH 6 S-(j 



l)H 2 = N ra H 3n+2 S, 



?)=v[NH 3 .8] 



} 



• (i) 



The terms corresponding to n = l, n — 2 are known. The 

 equation to the cumulate suggests the possible presence of a 

 sulphur derivative of hydroxylamine. 



