272 Researches respecting the radical of Benzoie Acid. 
From these numbers we obtain by volume as the theoretical result, 
14 atomsofCarbon,  - - 107.018 - - 60.02 
10 “© Hydrogen, - - 6.239 - - 3.51. 
ate A @sayeen, = - 20.000 - - 11.55 
2 ‘6 Chlorine, - - 44.265 - - 24.92 
177.522 100.00 
By calculation the numbers yield a somewhat smaller quantity of 
carbon and hydrogen than was obtained by analysis. ‘The reason 
undoubtedly is that in preparing the chlorine compound, perhaps 
suinz Of the oil of bit. alm. escapes with the chlorine. In no case 
is the difference of such importance, that the conclusion to which we 
arrive respecting the composition of this body, can be considered 
false. 
With respect to the properties of chlorobenzéyl we have yet to re- 
mark that by warmth it dissolves Phosphorus and sulphur, which by 
cooling again separate in the crystalline form. With sulphuret of 
carbon, it may be mingled in every proportion, and, as it would seem, 
without suffering decomposition. With solid chloride of phosphorus, 
it becomes strongly heated, with the formation of liquid chloride of 
phosphorus and an oily, strongly ee body which we have not 
farther examined. 
The very remarkable behavior of chlorobenz6y] in dry ammoniacal 
gas, and its decomposition with alcohol, we will treat of in a separate 
part of this essay. 
If chlorobenzéyl be treated with metallic bromides, iodides, sul- 
phurets or cyanurets, such an exchange of constituents ensues, 
that a metallic chloride on the one hand, and a combination of ben- 
zoyl with bromine, iodine, sulphur or cyanogen on the other hand, 
are generated, which are composed similarly to the chlorobenzoyl. 
Bromobenzoyl.—This compound is formed directly by mixing bro- 
mine with hydrobenzoyl (bitter almond oil.) ‘The mixture becomes 
heated and throws forth thick vapors of hydrobromic acid. By heating 
still farther, this acid as well as the excess of bromine is expelled. 
The bromobenzéyl (bromide of benzoy]) is a large foliated, crystal- 
line mass of a brownish color, soft and at common temperature 
nearly semifluid. It melts by a gentle warmth into a brownish yel- 
low fluid. It possesses an analogous odor to the chloride, though 
much fainter and therefore aromatic. In the air it smokes faintly, 
