Chemistry and Physics. 227 
(H,O),,5 a ae: iu acacia (W028 Be. (H, 0)... 
with the barium metatungstate (WO,),BaQO, (Ht 0), of Scheibler : 
a diammonium borotungstate (WO,),B, nN H,0).(H,0),, (H,O),. 
1 nh ammonium metatungstate described a Tl 
somorphism in these cases is te; so much so that, for 
) ) 
xample, a crystal of barium metatungstate will cause a super- 
saturated solution of di-barium borotungstate to crystallize at 
once. Acceptin ng a hipcsine sa made by Marignac some time ago, 
men 
hich fuse in praia tubes at 195°. When the mass h 
liquid, if the tube be suddenly removed from the bath and quickly 
cooled, the contents solidify to a transparent vitreous mass which, 
ace.— Ber. Berl. ra Ges., xv, 2835, Dec., 1882. 
3. On Nitrogen Sanita Naa EUIL has examined 1 yer 
ide of nitrogen discovered by Wobler in 1859, The process of 
ed by 
perchloride with ammonia gas, But the author finds that Fordos 
& Gelis’s process for nitrogen sulphide gives Setage results. Ten 
grams of the perchloride are mixed wit w drops of carbon 
disulphide, and the paste thus made is Ganuiaed in a liter of CS, 
in sic eh it is almost insoluble. Into this liquid a current of dry 
as is passed, Flocks of ammonium chloride are pre- 
