■ DE. E. EEANKLAM^’S EESEAECHES ON OEGANO-METALLIC BODIES. 
71 
493 mm, pressure and 13’^C., or 55’13 cubic centimetres at 760 mm. pressure and 0°C., 
equal to ‘06628 grm. 
III. ‘1913 grm., treated with dilute nitric acid, evaporated to dryness and ignited, 
gave ‘0593 grm. oxide of copper. 
IV. •1780gi’m., dissolved in water and precipitated with caustic potash, gave ‘0556 grm. 
oxide of copper. 
The formula above given requhes numbers which sufficiently correspond with those 
obtained : — 
Calculated. 
A 
Eound. 
A 
Ce . . 
GO 
19‘18 
r 
I. 
19‘60 
II. III. 
IV. 
Hh. . 
. 11 
4‘39 
3‘93 
N, . . 
. 56 
22‘37 
21‘82 
2CuO . 
. 79‘30 
31‘68 
31‘00 
31‘24 
0,. . 
. 56 
22‘38 
250‘30 
100‘00 
Binitroethylate of Magnesia. 
N.(C,H,)MgO,. 
Prepared by treating the solution of dinitroethylate of zinc with excess of caustic 
magnesia, boiling and filtering. The filtered solution, concentrated in a water-bath, 
yielded granular crystals, which fuse at 100° C. and dry up to a solid amorphous mass. 
This is the anhydrous salt. 
I. *2504 grm., moistened with nitric acid and cautiously ignited, gave ‘0496 grm. 
magnesia. 
II. ‘3782 grm., similarly treated, gave *0758 grm. magnesia. 
III. ‘0950 gi‘m., treated by Simpson’s method, gave 52‘5 cubic centimetres nitrogen at 
337‘0 mm. pressme and 14°‘l C., equal to 22‘08 cubic centimetres at 0° C, and 760 mm. 
pressure, or ‘02787 grm.* 
The following is a comparison of these results with the theoretical numbers : — 
Calculated. Eound. 
L II. III. 
C, . . 
. 24 
23‘76 
H, . . . 
5 
4‘95 
N, . . 
. 28 
27‘72 
29‘37 
MgO . 
. 20 
19‘80 
19‘81 
20‘04 
O3 . . 
. 24 
23‘77 
101 
100‘00 
* This determination was made before it was discovered that the nitrogen was always contaminated with 
binoxide of nitrogen, and hence the number obtained is considerably too high. 
L 2 
