Sone 
428 Scientific Intelligence. 
9. On the arsen-ethyls——Lanpott has studied the combinations of 
ethyl with arsenic, which are obtained by the action of iodid of ethyl 
upon an alloy of arsenic and sodium. Of these compounds two, namely, 
arsenbiethy! and arsentriethyl, are to be regared as analogues o kak- 
odyl, while the third, arsenethylium, is an ammonium in which nitro- 
gen is replaced by arsenic and hydrogen by ethyl. We omit the de- 
pounds, and pass to the description of their constitution and properties. 
Arsenbiethy! is a faintly yellow colored liquid, which strongly refracts 
light, and which possesses an extremely disagreeable penetrating odor 
of garlic. It boils between 185° and 190°C. Exposed to air it bursts 
chlorine, iodine, bromine, &c., gives with 1 equivalent of oxygen 
a powerful base which forms with acids both acid and né ral _— 
These cqmpounds are remarkably susceptible of crystallization, an 
remain unchanged in the air. They are all without smell, have a 
bitter almonds. By the action of nitric acid at a gentle heat the new 
alcohol is converted into oil of bitter almonds ; the action of chromic 
acid converts it into benzoic acid. The vapor of the alcohol passed 
over red hot platinum sponge yields an oil which is specifically lighter 
than water and is probably C1zHe. By passing muriatic acid gas eid 
the alcohol the liquid separates into two layers, of which the upper 18 
the chlorid C1all7Cl. This is a highly refracting, strong-smel'in 
liquid, heavier than water, and boiling between 180° and 185°. With 
caustic potash it gives chlorid of potassium and the alcohol is regen’ 
