622 PROFESSOR FREDERICK GUTHRIE 
On analysis, 
I. 0:2866 grms. gave 42-22 per cent. carbon and 7:40 hydrogen. 
II. 0-4279 grms. gave 50-88 per cent. chlorine. 


Cali a LAS Osl Found— 
requires, i Of, 
C= 42:55 42-22 
H= 7-09 7-40 Jas 
Cl= 50°35 Hy 50°88 
99-99 100°50 
The bichloride of amylen is a colourless liquid, of aromatic smell, and sweet 
and camphorous taste. It burns with a smoky flame. Its boiling point is 
between 141°C. and 147°C. Its specific gravity at 9°C. is 1-058. It is insoluble 
in water, but miscible with ether. In alcohol, it dissolves freely on boiling; but 
on cooling an alcoholic solution saturated with the bichloride of amylen, the 
ereater quantity separates out. 
It is evident that, if the recomposition which takes place were a simple trans- 
ference of two equivalents of chlorine from the pentachloride of phosphorus to 
the amylen, the entire product should be a liquid. This is never the case, even 
when a great excess of amylen is employed. 
On the other hand, in the preparation of the bichloride of amylen, if the 
mixed product got by the action of the damp air upon the solid mass be exposed 
for only some hours, and then treated with water, a large quantity of amylen is 
still found in it. 
From these two considerations, it seems probable that the terchloride of phos- 
phorus, which is the supplementary product to the first equivalent of bichloride 
of amylen formed, unites with a second equivalent of amylen to form a solid 
easily decomposable by water, and analogous to the pentachloride of phosphorus, 
P Cl, +2 C,) Hyp=C,, Hy, Cl, +P Cl, C,) Hyo. 
Whether this be the case or not, the bichloride of amylen requires long-protracted 
washing before it ceases to yield acid to the water. 
Binitroxide of Amylen. 
Cio Hi) 2 NO, 
Although the distinction between halogen salts, of which chloride of sodium 
is the prototype, and oxygen salts, of which sulphate of soda may be taken as the 
representative, is a convenient one, the line which separates the two classes has 
always been vague, and is becoming gradually obliterated. The isolation of the 
constituent groups in oxygen salts, supplementary to the metallic base, has contri- 
buted largely to this obliteration. Anhydrous sulphuric acid, peroxide of hydrogen 
and sulphocyanogen stand in the same relation respectively, to sulphite of potash, 
hydrate of potash, and sulphocyanide of potassium, as chlorine does to chloride 
of sodium, 
Na, Gly. 1 S05 Ko HO] Cys; 
