Al4 Scientific Intelligence. 
analogous compounds PCls, SiCls, AsCls, of PBrs and SiBr3, and 
of SnCle and TiCl2, from which it may be inferred that tin and 
litanium on the one hand, and phosphorus, silicon and arsenic on the 
other have the same specific volumes, which for tin and titanium = 18-7, 
and for phosphorus, silicon and arsenic 25. Antimony has a spec. 
volume of 33 as deduced from both its chlorid and bromid. 
The author next points out the fact that the quotient obtained by di- 
the quotient being here 4°7. A similar result is obtained for com- 
pounds containing chlorine, bromine, iodine and sulphur, and it is fur- 
ther shown that between the numbers thus deduced there exists approx- 
question in consequence of the smallness of the numbers appear to 
correspond more closely than they really do, the variation being from 
10 to 16 per cent. For these reasons the author prefers to retain the 
numbers which directly express the specific volumes and not those 
which express the mean spec. vols. The memoir is concluded by. 
many judicious observations and interesting isolated facts for which 
however we must refer to the original.—Ann. der Chemie und Phar- 
macie, xcv, 1, 2 and 3 Heft, October to December, 1855. : 
4. On the different methods of determining the weak or strong baste 
properties of an oxyd. —H. Ross has published the continuation of his 
researches on this subject, and has obtained some valuable analytical 
with a solution a niac, a method which in principle was 
already employed by Deville. The same is the case with sesquioxyd 
of iron: in both s however all the oxyds must be freshly precip! 
tated and not ignited. The author next studies the behavior of the 
various oxyds toward a solution of chlorid of mercury. In their rela- 
tions to this substance all oxyds may be divided into three — 
_ 5. On a new class of alcohols.—Canours and Hormann have iden- 
tified acroleine and acrylic acid with members of the propylene series. 
Their investigation may be regarded as a generalization of t resul! 
obtained by Zinin, Berthelot and de Luca, with the iodid of propylene; 
and they have succeeded in producing what may be regarded as ee 
