142 Two new Acid Compounds. 
ceeds and the products are varied: if by cooling the vessel, or using 
several small vessels, a slight elevation of temperature only is pro- 
duced, the alcohol is absorbed and after twenty four or thirty hours, 
a consistent mass, having some chloric ether and alcohol mixed with 
it remains. ‘This mass treated with its bulk of warm water, affords 
a solution of the saline part, and the washings of the lime being mix- 
ed with it and evaporated, till a saline pellicle forms, the salts crys- 
tallize on cooling. ‘The crystals separated from the fluid by a thin 
cotton filter and pressed, will readily dissolve in a small quantity of 
distilled water, a few grains of carbonate of lead being added and 
the fluid boiled, excess of lime is removed, the clear solution by 
evaporation, will afford saline pellicles, which may be removed as 
they form, and when dense, the solution will give much salt in acicu- 
lar, prismatic crystals on cooling. By repeating the operations of 
crystallization, the two salts can be separated with considerable accu- 
racy : the minute quantity of the more soluble salt, may be entirely ~ 
detached from the other, by washing it in two bulks of alcohol. 
These salts are neutral and consist of distinct acids united to lime. 
The acid which exists in the less soluble salt, I have named chloro- 
vinic, its characters being the most diverse from the hydro-chloric, 
and to the other have applied the appellative chlorovinous. 
Chlorovinate of lime, when obtained from solutions containing 
traces of alcohol, is in the form of rectangular tabular crystals, much 
disposed to group and form radiated masses; it possesses a pearly 
lustre, is translucent and of a light yellow color, the crystals have the 
tenacity so apparent in ferro-prussiate of potash. At 212° F. ex- 
posed to dry air, it loses no water, nor is the interior arrangement of the 
crystals altered; they are, therefore, anhydrous. When heated in a 
tube at 300° to 400° F-., it becomes brown, a fluid forms, which gives 
to the mass the appearance of fusion: the vapor is dense and color- 
less, readily condenses in water, and is nearly pure chlorovinous acid : 
a dark gray, dry residue of chloride of calcium and carbon, remains. 
In water it dissolves and affords a dense, colorless solution, which, at 
the point of ebullition, dissolves but little more salt; it dissolves slowly 
in alcohol, and its hot saturated solution does not deposit crystals on 
cooling. Its aqueous solution gives with pro-nitrate of mercury, a 
salt of moderate solubility, but does not occasion any precipitate, or 
-cloudiness, in solutions of nitrate of silver, nitrate of lead and nitrate 
of copper. Orxalic acid, precipitates a white oxalate of lime and 
detaches the acid. 
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