27 
of zinc and Benzyl-chloride and ethyl-benzol. Fifty grammes 
of ethyl-benzol and 60 grammes of Benzyl-chloride were heated 
along with powdered zinc, in flask with an inverted condenser, 
till no more H Cl was liberated ; the liquid was poured ofl* 
from the zinc and distilled till the thermometer rose to 250°. 
The distillate (80 grammes) was, along with 50 grammes of 
ethyl-benzol and 70° of benzyl-chloride, treated in the same 
manner. The distillate from this (87 grammes) was likewise 
heated with 50 grammes of ethyl-benzol and 80 grammes of 
benzyl-chloride, and the distillate (42 grammes) was mixed with 
50 grammes of ethyl-benzol and 90 grammes of benzyl-chloride, 
and the operation repeated. The collected residues over (250°) 
were repeatedly submitted to fractional distillation, till a constant 
boiling point was obtained. From 200 grammes of ethyl-benzol 
and 800 of benzyl-chloride he obtained 105 grammes of the 
pure hydro-carbon, and 46 grammes of unchanged ethyl-benzol. 
He also, at the same time, received some other hydro-carbons 
boiling above 850°0, which he was unable to purify for want of 
a suitable thermometer. The Benzyl-ethyl-benzol Cg H 5 —C Hg 
Cg H 4 —C 2 H 5 is a colourless liquid, sp. gr. 0*985 at 18°:9.C, it 
has a weak aromatic peculiar smell; it is easily soluble in Alco° 
hoi. Ether, or Chloroform, insoluble in water. It boils between 
294° and 295°C. This hydro-carbon may also he regarded as 
a substitution compound of JNIethan, C H 4 , in which two atoms 
of H are replaced, one by phenyl, Cg Hg, and the other by ethyl- 
phenyl, Cg H 4 —C 2 Hg; the hydro-carbon may then be called 
phenyl-ethylphenyl-methan. When 10 grammes of the pure 
hydro-carbon are oxidized by being boiled for several days, with a 
mixture of 60 grammes of bichromate of potassium and 90 
grammes of sulphuric acid and 270 grammes of water, in a flask 
w’ith an inverted condenser, a Ketone, Cg Hg—C O—Cg H 4 —Cg 
Hg is flrst formed, which is further oxidized into a Ketone-acid, 
Benzoyl-benzoic acid, Cg Hg —C O—Cg H 4 —C O O H, before 
all the hydro-carbon is attacked. When the hydro-carbon had 
disappeared, the liquid was distilled with a current of steam 
passing through it, the Ketone came over with the vapour, the 
distillate was shaken with ether which separated the Ketone ; 
the ether was then evaporated, and the residue which it left was 
