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Chemistry and Physics. 453 
points.—The labor consequent upon the determination of a vap 
density in the case of a substance of high boiling point by the 
method of Deville and Troost, has led Vicror Meyer to contrive 
anew method which is simple and easily applied, using no mor 
material than the method of Hofmann and yet making determina- 
tions up to the boiling point of sulphur, 444°2°. In place of mer- 
cury, Wood’s fusible metal, fusing at 70°C. is used. The principle 
involved consists in volatilizing a small but accurately weighed 
quantity of the substance in a vessel previously completely filled 
with the fusible metal, and then determining the volume of the 
vapor by heating in sulphur vapor and measuring the quantity of 
metal which has overflowed. The vessel employed is a bulb of 
about 25 ¢. c. capacity having a fine point at top and a tube 6 to 
5. New Vapor-density method for Substances of high Boiling- 
or 
ow. 
caleulated and reduced. All the data are now known, and in cal- 
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cal. 6-15. Of triphenylamine 8°49; cal. 8°48. Of anthraquinone 
(22; cal. 7-19. Of paradibrombenzene 8°14; cal, 8°15.—Ber. 
Berl. Chem. Ges., ix, 1216, September, 1876. G. F. B. 
8. On Glycero-phosphoric acid from Brain Tissue.—Tuvvt- 
cHum and Kinezerr have described some of the salts of glycero- 
Phosphoric acid obtained from kephalin, a substance prepared 
the former from brain tissue. en boil 
barium salts of certain fatty acids, barium glycero- hosphate, and 
one or two nitrogenous bases result. Th 
