112 Scientific Intelligence. 
but in very small quantity. Of the solvents tried, only those which 
were selenium-compounds dissolved black selenium 
Rathke also examined the compounds which sulphu r forms with 
ange hoping to throw some light upon their mutual iso-dimorph- 
rst melted the substances together in the ratio of one 
pain of nein to two of sulphur, repeatedly extracted the re- 
sulting mass with carbon disulphid, and crystallized out the por- 
tion dissolved in fractions. The c erystals, however, increased pro- 
gressively in sulphur and diminished in selenium. The precipitate 
aie like essen, i proant were peed which sive. on 
3 r 
crystals, then, thoug neans a mixture of the constituents, 
do not rrespond in composition to the formula SeS,, whi 2 
quires 55°42 per cent Se and 44°58 per — The poner: was 
reacts upon sulphur docyd collected aan treated as above. It 
contained considerable black selenium, not taken up by the solvent. 
On Faolebie in & aaa ee three products were obtained, one 
ed 
of minute “dark + er alg rounded pres ; “). ‘of brilliant-red 
prisms ; and he of pie tabular og On ana es a 
as isomorphous mixture 
Carbon diselenid €Se, was prepared but only in small quantity, 
not even sufficient for analysis. It appeared as a thin, brilliant- 
brown liquid, of peculiar and disagreeable odor, recalling at first, 
when dilute, that of carbon dieu phid, but being when concen- 
the blue selenium flame, was not very volatile, te was insoluble 
in all solvents tried. At the same time there was formed ethyl 
(Se 
selenxanthate, a 8 and potassium selenxanthate, bSe a8 
but succeeded in getting only pace Ts chlorid Se (€, 
H,),Cl, in combination with zine chlorid, and also with a 
chlorid.— Ann. Ch. Pharm., clii, 181, Nov. 1869. 
10. On the preparation of nitrogen ——— bane? anhydeit) 
ET and ViGNoNn ore for this purpose a double U tube, in 
each bend of which 140 to 150 grams of fey nine is placed, 
the whole peng heated to a tem pévebure of 60°C, Phosphoryl 
chlorid (POC1,) is allowed to fall str vara into the first leg 
of the tube. The nitryl chlorid vob 
pore a receiver, in which eg Sara 
a produced. ,reacts up- . 
on the silver nitrate in the seco a is attached, ae 
coll 
