424 Scientific Intelligence. 
to 200° in a sealed tube for several hours. €Cl,+ ZnO=€09Cl,+ 
ZnCl,. The product, however, is mostly destroyed by the action 
of the zincic oxyd thus: €09Cl,+Zn6=ZnCl a. 
(2.) By passing a mixture of carbonic tetrachlorid vapor and 
carbonous oxyd gas over pumice heated to about 400°. 
(€Cl,).+€O=€0Cl,+6, Cl,. 
(3.) By similarly treating a mixture of carbonic tetrachlorid va- 
por and carbonic dioxyd. €Cl,+€6,=(€9Cl,),. 
(4.) By acting on carbonic disulphid with hypochlorous oxyd: 
€5,+(Cl, 8) s=(SOCl,),.4+€0Cl,. 
Bull. Soc. Ch., U1, x, 188, Sept. 1868, G. F. B. 
13. On the relation between boiling point and constitution of hy- 
drocarbons.—The saturated hydrocarbons whose constitution is 
ence of boiling-point. (1) The first group comprises hydrocarbons 
in which the carbon atoms form a simple chain; i. e,, those in which 
no carbon atom is united to more than two others. Beside the first 
three members of the series, di-ethyl, hexylic hydrid from suberic 
acid, and heptylic hydrid from azelaic acid also be ong in this 
s come from these acids in the same way they must possess a 
simple constitution, e difference of boiling point between the 
members of t up is 31° ©, e hexylic hydrid from suberic 
hydrid ' ene ? boiling at 30°, ethyL-batyl J Slots at 
ap 
62°, ethylamy! } Gio 2) at 91°, and octylie hydrid J ee 
5 ‘ 5 r 
at 124°. (3) The third sroup contains the isopropyl grouping 
twice, instead of once; i.e, there are two atoms of carbon in it, 
which is united to three others. The difference of OH). 
point in this group is 25°, It includes di-isopropyl | €H (OH): 
: "(eH (eH,) 
boiling at 58° di-butyl-amylisopropyl 6H, * poiling at 
€H (€H,) 
3 
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