A NEW CLASS OF SALTS. 
489 
r III. 13'767 gi’S. gave 3'813grs. peroxide of iron and 6‘440 grs. sulphate of soda. 
^1^ IV. 21-536 grs. gave 5-932 grs. peroxide of iron and 10-410 grs. sulphate of soda. 
V. 19-610 grs. gave 5-470 grs. peroxide of iron and 9-890 grs. sulphate of soda. 
VI. 13-545 grs. gave 3-740 grs. peroxide of iron and 6-450 grs. sulphate of soda. 
VII. 15-740 grs. gave 4-420 grs. peroxide of iron. 
VIII. 13-788 grs. gave 3-880 grs. peroxide of iron and 6-7 10 grs. sulphate of soda. 
L IX. 25-155 grs. gave 7*028 grs. peroxide of iron and 12-120 grs. sulphate of soda. 
The combustions M^ere made with chromate of lead, 
r I. 9-I88 grs. gave 6-870 grs. carbonic acid and T300 gr. water. 
II. 8-580 grs. gave 6-315 grs. carbonic acid and 1-224 gr. water, 
r III. 13-815 grs. gave 10-080 grs. carbonic acid and I-78O gr. water. 
IV. 8-765 grs. gave 6-570 grs. carbonic acid and T280 gr. water. 
^ V. 12-010 grs. gave 8-790 grs. carbonic acid and T450 gr. water. 
VI. 15-070 grs. gave IO-79O grs. carbonic acid and T820 gr. water. 
^ VII. 9-000 grs. gave 6 580 grs. carbonic acid and M 10 gr. water. 
VIII. 8-645 grs. gave 6-340 grs. carbonic acid and T184 gr. water. 
IX. 10-921 grs. gave 8-035 grs. carbonic acid and T309 gr. water. 
The nitrogen in this salt was determined by Dumas’ quantitative method, an air- 
pump being used, so as to facilitate the expulsion of air from the apparatus. 
I. 7*903 grs., by Dumas’ quantitative method, gave 117 CC. gas ; thermometer 
11°-1 C. ; barometer 30-415 inches. Hence the nitrogen is 27-78 1 per cent. 
II. 4-6 grs., also treated by Dumas’ method, gave 68 CC. gas ; thermometer 45° 
Fahr. ; barometer 30-742 inches. Per-centage of nitrogen 28-79. 
From Iron Salt. 
From Copper Salt. 
From Prusside of Potassium. 
Iron 
... 19-576 
19-912 
19-387 
19-281 
19-525 
19-320 
19-56 
19-69 
19-59 
Sodium 
... 16-114 
00 
15-160 
15-795 
16-348 
15-88 
15-90 
15-76 
Carbon 
... 20-392 
20-073 
19-899 
20-442 
19-960 
19-530 
19-94 
20-00 
20-06 
Hydrogen ... 
1-572 
1-583 
1-437 
1-622 
1-340 
1-340 
1-37 
1-52 
1-33 
Nitrogen 
Oxygen 
***| 42-346 
42-712 
127-781 
1 16-336 
j 42-860 
128-790] 
1 14-037 J 
t 
43-25 
42-89 
43-26 
100-000 
100-000 
100-000 
100-000 
100-000 
100-00 
100-00 
100-00 
In order to estimate the water with more precision than can be done in an organic 
analysis, a portion of salt was heated in an F tube to which a chloride of calcium, 
tube was attached; 9*52 grs. gave 1*20 gr. water, equal to T40 hydrogen per cent. 
The above analyses correspond to the following calculated formula : — 
Calculation. 
5 Iron . . 
..... 140 
19-33 
5 Sodium 
116 
16-02 
24 Carbon 
144 
19-89 
15 Nitrogen . 
210 
29-00 
10 Hydrogen 
10 
1-38 
13 Oxygen . 
104 
14-38 
724 
100-00 
