486 Seientific Intelligence. 
here w is the weight of the substance used, W’ the weight of alloy 
which filled the bulb at 100°, and W the weight which overflowed 
in the sulphur bath; also H the height of the barometer and /A the 
difference of level of the alloy in the bulb and neck of the appa- 
ratus at the moment it was withdrawn from the bath. 
Wood’s fusible alloy is exceedingly well adapted to the use to 
which it has been so beautifully applied by Victor Meyer. 
prepared and sold by Dr. Schuchardt of Gorlitz it appears to have 
a — constant co ommpoeition and equally constant physical quali- 
tie Spry aden it is but slightly acted on by boiling sulphur an 
can reaaie be recovered from the sulphur bath into which it over- 
flows. It can an be easily cleaned and used over again re- 
peatedly. But for these and other details we would refer to the 
ey full description of the process which has recently oi eae 
in Fresenius’ Zeitschrift fiir Analytische Chemie, xvi, 4 Of 
with any substance which would act chemically upon the alloy. 
Still it has already very oe extended our — of 
such substances it is both more easy of application and more’ 
site than the only comparable method, that of Dumas as 
ed by Deville and Troost. We add two examples for illus- 
foxcions 
Anthrachinon. . 
Substance used -_-. cite 0. ae OOCE2 germ. 
Met a reas Oe Me ene nrRenTT Oning eit ic ereie aie W...o 2644, * 
Which Gvermowed 22 .0c00.2.22W. =7,179°6.:...° 
Barometer height oo. 5. eis nen H =728% mm. 
pierenes Of level... 2 acs cence mee 388°. 
Resulting density .-.. ..2..2/.-0.- 7°22 
e OY Ge Ae OE kyon ean 7719 
Found by Grabe with the process of : 
Deville and Troos Se 
Paradibrombenzol. 
Substance weeds) os. bbs w == 0°0772 grm. 
Metal used ____ ._. i eee ee eee 
“which overflowed ......------ Wo @ 1874. * 
Barometer teint... .- 2 2c se H = 7285 mm. 
Difference of level .....--.-2.-...-- 
Restitting detisity 05505 oo. ik, 8°14 
Theory. fon 00 Eb By eden op een tins 8°15 
Po Os 
New Results in Physies.—(\.) A. F. Beraeren concludes 
wi the chlorides of the alkalies and alkaline earths possess 
greater electrical conducting power than the sblabie sulphates 0 of 
the same bases.—Ann. der Physik und Chemie, new series, vol. 1, 
499, 
“(2.) Sirow has undertaken an investigation of weak magnetic 
substances. His method consists in observing the deviation of an 
*astatic system of needles, produced by appending to it a cylin- 
