216 Seientifie Intelligence. 
; fe ee 
3. On Calcium Hypochlorite from Bleaching Powder.—\sixe- 
Z own some light upon the chemical constitution of 
bleaching powder, a subject upon which ver ch discussion 
yielded needle-shaped crystals called his attention to the matter; 
he repeated the experiment and isolated the crystals. They dis 
4 Tequires 18°60 Ca and 33:02 Cl. The second crop of 
1:2:2, which are those required by calcium hypochlorite. 
Hence Kingzett regards Odling’s view of the constitution of 
water, ANN observed that th result obtained was too low 
nd that the liquid posse liar odor recalling that of 
chlorofor Further investigation showed ine to be 
ixed with at least 10 per a substance boiling between 
80° and 165°, the principal part of which consists of bromofo 
is readily detected by the influence it has in lessening the 
ity of bromine in water as well as by its odor, which 18 — 
ly perceived when the bromine is agitated with a solution : 
otassium iodide, and the whole decolorized by sodium thiosul- 
phate.— Ber, Berl. Chem. Ges., viii, 792, June, 1875. &. F. ® 
m Analysis in titrition.— net 
has proposed to use his exceedingly ingenious quantitative metho 
of spectrum analysis in titrition. In a word, this method measures 
the intensity of any colored light by the quantity of white light 
