18 
MR. BARLOW ON THE FORMATION AND 
number agrees with the per-centage corresponding to the formula C 20 N HCl, as 
will appear on comparing the theoretical and experimental numbers. 
Theory. 
I ^ 
Per cent. 
1 equivalent of Cymidine . . . 149 80*281 
1 equivalent of Hydrochloric acid . 36*5 19*719 
1 equivalent of Hydrochlorate of Cymidine . . 100 
Sulphate of Cymidine. — A white crystalline salt, soluble in water. 
Oxalate of Cymidine. — A white crystalline salt, soluble in water. 
Gold Salt. — A yellow crystalline salt, slightly soluble in water. 
Iodine has no perceptible reaction on cymidine. 
Bromine produces a very feeble reaction on this base. 
When chloride of cyanogen was added to cymidine, a slight action took place, and 
the resulting substance, after having been boiled with water, and filtered, gave a pre- 
cipitate on the addition of caustic soda; thus affording evidence of the presence of 
a salt of a new solid base, probably analogous to melaniline. 
On adding chloride of benzoyle to cymidine, a slight action ensued, and a few 
minute crystals appeared, probably of benzo-cymidide. 
Nitric acid acts violently on cymidine ; a semi-solid substance separating on 
addition of soda. 
These are, however, merely qualitative experiments, and require further elaboration. 
Examination of substance, insoluble in hydrochloric acid, produced during the 
formation of Cymidine. 
Having been purified by repeated distillation, this substance was burnt with oxide 
of copper, when the following result was obtained : — 
*2623 grm. gave "8615 carbonic acid and *2530 water. 
The formula of cymole is C 20 H 14 . On comparing the per-centage numbers derived 
from this formula with those obtained from the substance by experiment, we find 
Theory. 
A 
Experiment. 
( ^ 
Per cent. 
Per cent. 
10 equivalents of Carbon . . 
120 89*552 
89*213 
14 equivalents of Hydrogen . 
14 10*448 
10*672 
134 100*000 
99*885 
The chemical identity of this substance with cymole is thus established. 
The boiling-point 175° C. also coincides with that of camphogene, which is recog- 
nized as the isomer of cymole. There is however an important physical distinction 
between cymole and this isomeric substance. It has already been stated, that when 
cymole is submitted to the action of fuming nitric acid at — a reddish-brown 
Experiment. 
Per cent. 
19*679 
