S. P. Sadtler on Fischer's Salt. 201 
follows. For the black or ios salt arg 8,)+2(KN6,)+H,90 
and for the yellow salt €o2N6,+2(KN6,)-+-H, 6, and the first 
may be termed a potassio-dicobaltous nitrite and the second a 
oa mono- tere nitrite. Appended are the analytical 
ts. 
Prep. No. 1.—Black Salt, very crystalline. 
5421 or. salt mre Sry gr. €o,K shine, Sage 43 p.c. CoO+K,9 
also gav r, £080, =30°57 p 08. 
"7341 gr. salt gave re oe €o0,K e350, — 50: 57 p.c. CoO-+K, 0 
also gave -4662 gr. €CoSO,=30°73 p. c. €o0. 
Prep. No. 2. Sh ib Salt (had not been washed for analysis. 
*3003 er. <r gave ‘3063 gr. €0,K,350,= i2 "44 Ee ce. Co8-+K,0 
O gave ‘1846 gr. CoSOu= 29°74 
3221 or, rae mee "3286 gr. Cosh 980.81 “45 rey c. €00+K2,0 
also gave 1971 gr. CoSO,—29°61 p. ¢. Cod. 
Prep. No. 3.—Black and Green Salts ‘aitod very crystalline. 
"6942 or, salt gave ‘6978 gr. €o.K 3504—50°70 p.c. €oO8+4+.KO 
also gave “4410 gr. €oSO y=<30°74 p.c. CoO. 
‘4713 gr. salt gave -4730 gr. Ooek.380,—50° ag! Pes ec. CoO=—K,9 
also gave ‘3004 gr. €CoSO,—30°84 p. ¢. 
Prep. No. 1.— Yellow Salt. 
also gave °2103 gr. CoSOi=22'05 p. c. 
ee ee ee +H,0 - 
Found p. c. cts. eor. p. cts. ‘ound p. cts. 
NS astray 30°65 29°67 30°79 22°11 22-08 
K,0—19-29 19°85 21°78 19°87 27°77 27°09 
N,6 -— 46 a 
H,6— 3°67 5°31 
nce. 
mmilari of soni Binds of N; 2 
80) wah ee bases are combined. 
in a fixed ratio. The explanation of this is that €0.0,3N,03 by 
lsestion with H,S@ is converted into two atoms of neutral 
€oS@. and becomes 2(€oSO1). 2600, 2N.03 simply assumes 
