J. P. Cooke, Jr., on Cryophyllite. ) 229 
is heated more intensely. With bisulphate of potash gives 
slight reaction for fluorine. The powder dissolves with some 
difficulty in melted borax, giving only the reaction for iron. 
In phosphorus salt it dissolves only with great difficulty and in- 
completely, giving in the reducing flame, even when treated with 
tin on charcoal, a colorless glass. The mineral is partially de- 
composed by hydrochloric acid; more perfectly by strong sul- 
phuric acid, and completely by fusion with carbonate of soda. 
An imperfect analysis gave the following results: 
Silica, - - : traies - - - 27:90 
Zirconia, —- - - - . - - 66°93 
Sesquioxyd of iron with trace of manganese, - 2°57 
Water, - - : . ‘ t is 2°19 
99°59 
could command, but not so good as might be desired, and | am 
nappy to learn that a more trustworthy analysis will soou be pub- 
ished, i i 
other earths and metallic oxyds, but without positive results. 
No distinct indications of titanium could be obtained with the 
blowpipe, although it is possible that in the presence of so large 
an amount of zirconia a small amount might have escaped no- 
the last drop, forming a large mass of white silky needles. 
solution of this chlorid, still acid to litmus paper, turned tu IC 
paper orange-yellow. Ina solution of the same chlorid, oxalic 
acid produced a voluminous precipitate, which, when the solu- 
Am. Jour. Sct.—Srconp Sexes, VoL. XLII, No. 128.—Maxcu, 1867. 
30 
