Chemistry and Physics. 115 
sulphate of teroxyd of thallium in dilute sulphuric acid. The precipi- 
tate may be washed with cold water in which it is quite insoluble. Boil- 
ing water decomposes this salt with evolution of carbonic acid. Heated 
ina glass tube the thallium is reduced and is easily fused to a single 
globule. The salt has the formula TIO,,8C,0,4+NH,0, C,0,+6aq. 
Strong nitric acid dissolves teroxyd of thallium, forming a erystalline ni- 
trate which has the formula TIO,, 3NO,+-6aq. The solution of this salt 
gives a siskin-green precipitate with ferro-cyanid of potassium and a 
yellow precipitate with the ferrid-cyanid. Iodid of potassium produces 
a black precipitate which is doubtless a ter-oxyd. Strecker suggests that 
ium presents analogies both with monatomic and triatomic elements 
and does not lend support to the theory of the invariability of atomici- 
ties— Ann, der Chemie und Pharm., lix, p. 207. W. G. 
1. On the synthesis of butyric and capronic ethers.—FRANKLAND and 
Duppa have published a preliminary notice of the very interesting and 
important results of their investigation of ‘the alternate action of sodium 
' |C+H 
atomic instead of equivalent weights, becomes C H . If one atom 
0C,H, 
of hy drogen in the atom of methyl be replaced by an atom of methyl 
CH, 
We shall have propionic ether C. H . The replacement of a sec- 
O 
OCH, : : 
ie: atom of hydrogen and methyl should yield butyric ether 
CH, 
Cc 
CH, * 
c 0 H Z which would also be formed by replacing one atom of 
(OC,H, | 
hydrogen in acetic ether by ethyl. The replacement of two atoms of 
hydrogen in acetic ether by two of ethyl should yield capronie ether 
C, 5 
Clic oa : 
0 H ,and finally the replacement of three atoms of hydrogen 
OC_H, : 
C 
Hy, | 
aoe By the 
C 
| ofc 
by three of amyl should yield margaric ether C sf C, 
ae “= 1 0C,8, * 
