474 Scientific Intelligence. 
‘livery tubes, through the former of which dilute ia i! acid is 
poured, the evolved sulphurous oxide being conducted into a bot- 
tle containing soda. er the reaction is over, the liquid is ex- 
tracted with ‘ether, the ether distilled to a small bulk, the residue 
were in a watch " glass and allowed to evaporate spontaneously 
ure vanillin, fusing at 81°, crystallizes out; it is dried over sul- 
phuric acid and weighed. After proving the exactness of the 
method, the authors used it in analyzing the vanillas of commerce. 
They found Mexican vanilla to yield 1°69 per cent, Bourbon va- 
Chem aes viii, 15, Sept., 
8. On the Localization of pte in the Tissues. —Soot ab 
BOFF has investigated in Gautier’s tileosate ory the distribution of 
the metalloid arsenic in the tissues and has found, contrary to the 
— belief, that it is specially condensed in the nervous tis- 
es. The ere made with dogs, with rabbits, and 
with frogs. Dogs bear large doses of arsenic readily, being able 
to take without difficulty 15 to 18 times the quantity which 
weight for weight would be fatal to man. The arsenic was ad- 
tated a for backs aiphie A bull ere took for 34 days per 
ally increasing quantities of arsenic from 5 milligrams to 150 mil- 
ligrams per day. 100 grams of the muscle contained *00025 arse: 
were quite Sead. A dog of il Klograms gk a 
pabectaciens injection of sodium arsenite, in 17 Th 4 
senic from the brain gave a decided reaction, that yi the cor 
was less, while for ~ liver and the muscles, only traces one 
detected. The toxical i of these facts is obvious — Bul 
Soe. Uh., TH, xxiv, “124, Aug., 1875 é. F. B 4 
Cold Bands of Dark’ Spectra. —MM. P. Dzsatss - 
Agmoner have examined with a thermopile the spectrum of t : 
flame of the lamp of Bourbouze and Wiesnegg; this source = hea’ 
is more convenient and trustworthy than the Drummond lamp 
With a 60° prism and lenses of rock-salt, on passing the Ii ee 
through a centimeter of water, four cold bands were distinctly 
shown. Their distances from the Paiee ~ end of the sp 
were 19/8, 30/6, 42’ and 52' respectively. These measurements ©" ” 
not have the same precision as those of the cae lines of the te of 
ao ctor ~~ sap show ree ca = — the pile must be placed oe 
ectrun 
