A NEW CLASS OF SALTS. 
491 
The analysis was made by decomposing the salt by Nordhausen sulphuric acid. 
The following estimations give the amount of water lost in the water-bath : — 
I. 14'865 grs. lost T765 grs., or ir873 per cent. 
II. 15*455 grs. lost T855 grs., or 12*002 per cent. 
III. 12*430 grs. lost 1*480 grs., or 11*906 per cent. 
IV. 20*155 grs. lost 2*245 grs., or 11*138 per cent. 
Mean . . 11*730 
The inorganic analyses yielded the following results : — 
I. 23*905 grs. gave 6*479 grs. peroxide of iron and 13*837 grs. sulphate of potash. 
II. 20*145 grs. gave 5*525 grs. peroxide of iron and 12*105 grs. sulphate of potash. 
III. 13*015 grs. gave 3*550 grs. peroxide of iron and 7‘660grs. sulphate of potash. 
IV. 12*945 grs. gave 3*536 grs. peroxide of iron and 7'600 grs. sulphate of potash. 
V. ]7‘195 grs. gave 4*832 grs. peroxide of iron. 
The organic analyses were made with chromate of lead. 
I. 7’475 grs. gave 0*448 gr. water and 5*403 grs. carbonic acid. 
II. 7'122 grs. gave 0*425 gr. water and 5*105 grs. carbonic acid. 
I. 
II. 
III. 
IV. 
V. 
Mean. 
Iron . . 
18*972 
19*198 
19*093 
19*120 
18*901 
19*056 
Potassium 
25*947 
26*934 
26*385 
26*388 
.... 
26*413 
Carbon . 
19*712 
19*548 
.... 
.... 
.... 
19*630 
Hydrogen 
0*665 
0*663 
.... 
.... 
.... 
0*664 
Nitrogen 
Oxygen . , 
j> 34*704 
33*057 
.... 
.... 
.... 
34*237 
100*000 
100*000 
100*000 
These results may be expressed by the following calculation : — 
Calculated. 
Mean. 
5 Iron . . 
. . 140 
18*92 
19*056 
5 Potassium 
. . 195 
26*35 
26*413 
24 Carbon . 
. . 144 
19*46 
19*630 
3 Hydrogen 
. . 3 
0*40 
0*664 
15 Nitrogen . 
6 Oxygen . 
. . 210 
. . 48 
28*38 4 
6*49 J 
34*237 
740 
100*00 
100*000 
According to this calculation the formula of the salt dried at 2 12° is Fcg Cyi 2 3NO, 
5K-1-3HO ; the salt loses in the water-bath 1 1*73 per cent, of water ; had it lost 12*7 
per cent, this would have corresponded to 12 equivs. ; 11 equivs. would yield a loss 
of 10*6 per cent. 
