146 
ON CEYLON MOSS. 
dissolves the phosphate of lime. When this solution is 
boiled, the carbonic acid is driven off, the lime it was com- 
bined with reunites to the excess of phosphoric acid in the 
super-salt, and insoluble phosphate of lime is again formed. 
This is the reason why the mixed and filtered solutions of 
super-phosphate of lime and carbonate of soda become tur- 
bid and effervesce upon the application of heat ; phosphate 
of lime precipitating upon the escape of the carbonic acid 
which held it in solution. 
To avoid the inconvenience, therefore, of being forced to 
refilter the liquid, it is necessary, in the preparation of phos- 
phate of soda, to mix the solutions of super-phosphate of 
lime and carbonate of soda boiling, when the whole of the 
carbonic acid will escape, and the entire of the phosphate of 
lime will become precipitated. — From the Dublin Hospital 
Gazette. 
ART. XLI. — ON CEYLON MOSS. 
BY M. SCHACHT, OF BERLIN. 
For some time there has existed in commerce a lichen 
known under the name of Ceylon moss, which is employed 
in the same cases as carrageen. 
This lichen is the fucus lichenoides, or sphserococcus. 
Tn order to ascertain the advantage to be derived from 
the employment of this moss for the preparation of a jelly, 
M. Schacht has made some experiments on the new plant, 
on carrageen, and on Iceland moss ; and it results that, to 
obtain 100 grammes of jelly of the same consistence, it is 
necessary to employ 24 grammes of Iceland moss, 4 of car- 
rageen, and 6 of Ceylon moss. The latter is less mucila- 
