O¥ THE MEADOW-SWEET. ~ > 465 
obtained by agitating the aqueous solution of hydrospiroilic acid with 
solution of bromine; it is immediately precipitated in white flocks: the 
supernatant liquid is colourless, has no smell, and contains hydrobromic 
acid. In order to free the bromide of spiroil from excess of bromine 
and hydrospiroil, it must be kept melted in a water-bath so long as 
acid fumes are given off. Bromide of spiroil is exactly similar to the 
chloride of spiroil in all its properties ; it is quite insoluble in water, 
and is easily soluble in ether and aleohol.. By the spontaneous evapo- 
ration of the alcoholic solution it is obtained crystallized ; bromide of 
spiroil melts at a rather higher temperature than the chloride, and like 
the latter may also be entirely sublimed: when boiled with water it 
evaporates unaltered. Its behaviour, with regard to the saline bases, 
is exactly the same as chloride of spiroil, but the alkaline salts are more 
difficultly soluble: 0-480 grm. bromide of spiroil dissolved in potash 
and decomposed by nitric acid yielded only 0-02 bromide of silver, 
‘J. 0-510 grm. fused bromide of spiroil yielded 
0°690 carbonic acid = 190°78 carbon. 
0°510 water = 13:11 hydrogen. 
Further, by solution as above-mentioned in pure caustic potash, and. 
combustion of the compound formed, 0°510 grm. bromide of spiroil 
became 0°485 bromide of silver = to about 0°2036 bromine. 
CarHOl 6 -iies. one fA 5 renee 37-41 
Hydrogen ...... 13°11 .....:... 2:57 
Oxygen .,....... ISB AD oes 20°02 
_ Bromine ......... 203°6O»; acess 40°00 
510,00? 100°00 
IT. 0°325 grm. bromide of spiroil yielded 
0°457 grm. carbonic acid = 126°00 carbon. 
= ROB 1 cc eu water = 8-99 hydrogen. 
III. 0°305 grm. bromide of spiroil yielded 
0°409 grm. carbonic acid = 113:00 carbon. 
POU saa: water = 7°88 hydrogen. 
If the proportions of bromine in I. be taken, we obtain in 100 parts 
I. 
Carbon......... SSATT hatiawe 37°05 
Hydrogen...... DoT Bis lass 2°55 
OCT a cncans, LOL Uaeeaes 20°40 
Bromine ...... 40°00 ...... 40°00 
