Chemistry and Physics. 479 
oep- Hence the formula of it should be HSO, or (SO,)OH. 
e importance of this conclusion lies in this, that, if it be con- 
ceded, the equivalence of sulphur is five in this compound and it 
becomes a perissad instead of an artiad as it is in all other com- 
binations —/. pr. Ch., xix, 485, June, 1879 
amalgam. But instead of the result expected a very different one 
odi : 
. cid, ex 
with tetrathionate, KOSS . SSO, K+4-Na,=KOSSNa+NaSs0,K ; 
with trithionate, KO,S. SSO,K+Na,=KO,SNa+NaSSO,K; with 
dithionate KO,S.SO,K+Na,=KO,sNa+NaSO,K. Precisely as 
HO,C H+H,=HO,C.H+H.CO,H. In order to test this 
reaction in the case of pentathionic acid, the author attempted the 
preparation of this body; but after five months of work he was 
unable to obtain it. This result raised the question of the exist- 
acid, therefure, appears to’ be as yet unknown.—Liebig’s Ann., 
excix, 97, Oct., 1879. en 
4. On the Atomic Weight of Tellurium.—W 111s has undertaken 
from the experiments of Berzelius and von Hauer, or the value 
and sulphur, 
