ON CHLORINATED CHLOROHYDRIC ETHER. 
221 
presented to him, at two different periods, liquids obtained by the 
reaction of chlorine upon bi-carburetted hydrogen, furnished to us 
under the name of Dutch liquid, by two of the most renowned 
manufacturing chemists of Paris. The first of these liquids^ ac- 
cording to Dr. Aran, gave very satisfactory clinical results, which 
he feels it his duty to make known. With the second specimen 
he was not successful. During our researches into the cause of 
this difference, we found the last mentioned liquid possessing the 
characteristics of Dutch liquid, simply, while the former presented 
more analogy with liquid chloride of carbon, than with Dutch 
liquor, properly so called, showing a higher density, a higher boil- 
ing point, and being entirely non-inflammable. 
In pursuing our comparative researches, we became convinced 
that the liquid was not chloride of carbon, but Dutch liquid, which 
had lost a certain quantity of hydrogen, and acquired an equivalent 
proportion of chlorine, i. e. chlorinated Dutch liquid. 
It is therefore certain, that the happy therapeutic results, recent- 
ly reported by Dr. Aran, should be attributed to chlorinated Dutch 
liquid, and not to that liquid in its ordinary chemical condition. 
But the price of this substance being too high to allow of its ad- 
vantageous introduction into therapeutics, we have proposed to 
substitute for it, an analogous ethereal compound, proceeding from 
the action of chlorine upon chlorohydric ether. 
It appears, from the able researches of M. V. Regnault, that 
chlorine, acting upon chlorohydric ether, takes from it hydrogen, 
forming chlorohydric acid, substituting itself in the place of the 
hydrogen, and giving birth to a series of compounds, more and 
more rich in chlorine, and which are all isomeric with the corres- 
ponding terms of the bi-carburetted hydrogen series. 
The isomerism is complete, for not only is the elementary com- 
position the same, but the densities of the vapors are identical. 
The order of molecular arrangement alone is different, thus clearly 
defining its chemical reactions. 
We now concluded that these two etheriform series, were en- 
dowed with the same therapeutic virtues, and therefore, that chlo- 
rinated Dutch liquid could be replaced in clinical practice by the 
corresponding chlorinated chlorohydric ether. This new compound, 
tested practically by Dr. Aran, among his patients, has completely 
confirmed our conjecture ; being found possessed of the same thera- 
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