]2 Ci.ASES ABSORBED EV CHARCOAL. 



phorus was covered with a hard brown cruft, from which the 

 phofpliorus was feparated by heating it in warm water. This 

 cruft was tenacious, and Alining in the dark. Heated, it took 

 fire like phofpliorus, and left a relidue of a fmall quantity of 

 oxide, which, on being melted with borax, exhibited the 

 chara&ers deicribed above, except that the globule retained 

 its clear green colour, after being cooled. It appears pro- 

 bable that thefe phenomena arofe from the phofphorus con- 

 taining cerium. But the phofphorus, kept for a month in the 

 fame folution, (lowly depofited a white powder; whence it 

 is uncertain whether the formation of the cruft, mentioned 

 above, was owing to the cerium. The t icid was always in 

 excefs in the folution, and the while powder had all the ap- 

 pearance of pholphate of cerium. 



With the Alkalies. 



Action of the (V.) The pure alkalies do not diffolve cerium, even by 



alkalies. fution. By this means it is eatily deprived of manganefe. 



Pure ammonia digefted with the oxide, does not diffolve it, 

 but renders it yellowifh. 



The carbonated alkalies diffolve the oxide of cerium in fmall 

 quantity. The folution is yellow, and is precipitated by the 

 acids. They alfo diffolve it by fufion in covered veffels. In 

 the open fire, it oxides too much to enter into folution. 



Iron or zinc do The folutions of cerium are not precipitated by iron or 



not precipitate z [ nc# 



cerium" The electric pile of Vol! a only decompofes the falls, and 



Action of gal- t ne yellow oxide adheres to the conductor. 



vanifm. 



Nav Experiments on Abforption by Charcoal, made by Means of 

 a new Machine. By C. L. Morozzo. 



(Concluded from P. 264 Vol. IX.) 



On Oxigen Gas, 



Oxigcn gas. 25tr! « A NEXT proceeded to the examination of the abforp- 

 tion by charcoal in oxigen gas. 



I therefore extracted fome oxigen gas from red precipitate 

 to be employed in my different experiments. Of this gas, 



trie 



