196 S. P. Sadtler on Fischer's Salt. 
pounds, which I am about to describe. Toa solution of €oCl,, 
which had been boiled and then acidified with acetic acid I 
added an excess of NaN®, solution. The mixture instantly 
tinct for analysis. This I found to be difficult. The brown 
salt I readily got almost pure, but succeeded only partially in 
obtaining the yellow one distinct. The brown salt continues to 
‘form, to a greater or less extent, even after the formation of the 
tion with the €o,6N®,. The brown salt I would call a di-sodio- 
€0,6N0, +4(NaN©,)+H,0. And €0,6N6, +6(NaN@,)+H,9 
The following are the analytical results : 
Brown Salt. 1st Preparation. 
5400 gr. salt gave -4676 gr. €0,Na,480,=39°94 p. c. ©o8 +Na,9 
also gave -2374 gr. CoO ,=21°27 p.c. CoO=23'54 p.c. 
029,. 
5866 gr. salt gave “5041 gr. €o,Na,4S0,=39°64 p. c. CoO +Na,O 
0 gave ‘2615 gr. €oSO,=—21°57 p.c. Fo0—23°87 p-¢ 
0,0,. 
Brown Salt. 2nd Preparation. 
‘5602 gr. salt gave -4805 gr. €Co,Na,450,=39°57 p.c. FCoO+ Na, 
also gave *2425 gr. €CoSO,—20°95 p.c. CoO=23'18 p.c 
to, 0.. 
‘4671 gr. salt gave ‘4027 gr. Co,Na, 450 ,=39°77 p.c. €o8 + Na,O 
also gave “2026 gr. CoSO,—20-99 p.c. CoO—23'23 p.¢- 
‘ 0,03. : : 
With 1-7054 gr. salt, combustion-tube lost “4476 gr., of which, 
€a€l, tube took up 1156 gr.=6-78 p.c. H, © leaving ‘2920 
gr.=17'12 p.c. N.==46°47 p.c. N28,. 
had gone into solution. It is now filtered and the filtrate evaporated to an oily con- 
on ie o it will ize out. Me Sine 
Wwe wish i * we Can give it the treatment with alcohol descri 
Hampe (Ann. Ch. a Ph. 125, 335). This frees it completely from saltpetre and 
¥ 
