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SELECTED ARTICLES. 
the red oxide, by shaking it without the contact of light, with 
fresh water in which was contained oxygen. 
From this it is evident that the white incrustation of 
phosphorus is a combination of phosphuretted hydrogen and 
of red oxide of phosphorus, and that there is but one oxide of 
phosphorus, which is red. 
In keeping phosphorus under water, it becomes decomposed, 
forms oxide of phosphorus and phosphuretted hydrogen, part 
of which combines with the oxide of phosphorus, and gives 
rise to the white substance mentioned. 
Journal de Pharmacie. 
ART. XLUI.— UPON THE ANIMAL OIL OF DIPPEL— By M, 
Klauer, pharmacien at Mulhausen. Extracted by M. Vogel. 
There are a great number of pharmaceutic preparations 
formerly much employed, which have at the present time 
fallen into complete discredit, or at least, are less in use. 
Should we not, for some of them at least, attribute the cause 
of this to the pretended rational modifications which the pre- 
paration of them indicated by their authors has undergone, 
and which has changed them in nature and medical properties. 
This observation alreadily verified as regards the spirit of 
mindererus, is especially applicable to the animal oil of Dippel, 
upon the composition of which modern chemistry has thrown 
so much new and unexpected light. The older authors say 
that this oil has a sweet smell, and an agreeable taste; the same 
certainly cannot be said of our volatile animal oil, which has 
an extremely disagreeable taste and smell. What can be the 
cause of this difference? The first idea which naturally pre- 
sented itself to M. Klauer, was to search for the method of 
