104 . Scientific [ntelligence. 
showing that we may consider alcohols as compound ethers, in which 
hydrogen acts the part of a negative radical. With the simple ethers, 
if the hydrobromic acid be in excess we have :— 
B H 
O+ (HBr) = 77 | O+(ZBr)., 
but if the ether be in larger proportion, then 
B B 
2 O+EB=F t O-+- BBr. 
The mercaptans give rise to two reactions, First we have 
“ t SHBr= 1 1S42Br, 
and secondly nt S+(s Br) = -S+ HBr. The simple sulphur 
Br 
ethers act similarly ; the first reaction is z } S+HBr = } S+ BBr, 
B 
the second . 1S+BBr=} S, as Cahours has also shown,—Am 
Br 
Ch. Phys., TV, x, 5. 
4. On new mixed acids—In a more recent paper, Gat has described 
some new mixed acids which he has produced. Reasoning from the well 
known fact that by the action of potassic hydrate upon monobromaceti¢ 
acid, glycollic acid is formed, according to the equation 
Sstisled 5. poate ee } OLKBr, 
(or, as is more clearly exhibited in Frankland’s notation, 
CH,B CH.H 
1 G0 Hot KHo= | colts +KBr),— 
the present Sear several new ones to the list. ot 
By heating to 100° C. in a sealed tube, an alcoholic solution of ethylic : 
monobromacetate with — acetate, he obtained a liquid having® | 
iling point was 180° C., and whose formula, 4 
ted sealed tube with at 
