Chemical Science. 437 
resembling alcohol in its obvious properties. It was miscible 
with water, dissolved camphor and gum resins, burned with a 
flame like that of alcohol, and had a specific gravity of between 
830 and 900. It differed however from alcohol, as the follow- 
ing experiment shewed. To a portion highly rectified, the pro- 
per proportion of sulphuric acid was added to form with alcohol, 
ether, and the whole was distilled; but instead of procuring ether, 
a spirit came over still miscible with water, and burning with a 
blue flame. Its smell was a little altered, and its specific gra- 
vity reduced. The residuum in the retort was a black pitchy 
substance, becoming perfectly hard and brittle on cooling. 
Mr. Taylor has promised more information on this subject. 
Phil. Mag. Ix. 315. " 
6. Phosphate of Soda and Ammonia.—M. Anatole Riffault has 
given the following as the composition of this salt derived from 
very careful analysis. It accords perfectly with the cemposition 
rie views given by M. Mitscherlich in his memoir on crystalline 
forms. 
. Phosphoric acid . . . . 34.491 
ee ee a een oy tole at. eT eae 
AUMMOOIA sc fo, dekh FED 
WY StOR eee ae tt ns Ae 
100 
Or, Neutral Phos. Soda . . 31.999— 1 atom. 
Phosp. Ammonia . . . 26.377—. 1 atom. 
WW Stemi. ce ect dit ante oA O4 1D atoms: 
100 
Microcosmic salt, of which the analysis is given by Fourcroy, 
consists of one atom sub-phosphate of soda, one atom sub-phos- 
phate of ammonia, and three atoms of water; so that by calcina- 
tion it becomes a neutral phosphate of soda. 
Sulphate of soda and ammonia consists of 
Sulphate of soda . . . . 42.239—1 atom. 
Sulphate ofammonia . . . 31.729—1 atom. 
Wy Bber oy) IRR WILT Hh gb UE Ee ae, 
Ann. de Chim. xx. 
7. On a beautiful Blue Colour.—A portion of a very fine blue 
pigment was placed in the hands of M. Braconnot, by M. Noel, 
for examination. It was the produce of a manufacture at 
Schweinfurt, where the preparation was kept secret. M. Bra- 
connot readily ascertained it to be a triple compound of arse- 
nious acid, hydrated deutoxide of copper, and acetic acid, so 
that it approximates to the green of Scheele. After various 
