ON CEYLON MOSS. v 147 
ginous than carrageen, but it has the advantage over it of 
furnishing a less colored jelly. 
A German physician, Dr. Liegmund, has maintained, 
that this moss does not contain iodine, but the presence of 
this principle in it is easily demonstrated. For this purpose, 
this moss is incinerated, the residue is treated several times 
by hot water, the united liquids are evaporated to dryness. 
The solid mass obtained with alcohol is agitated; and eva- 
porated. The solid product is placed in a glass tube, a few 
drops of concentrated sulphuric acid are poured on, it is 
closed with a starched paper, heated, and the blue tint of 
iodine is very soon manifested. 
By redissolving, in distilled water, the product of the 
evaporation of the alcoholic solution, and by precipitating 
it by nitrate of silver, the proportion of iodine may be de- 
termined. 
In Ceylon moss, it is about grammes 000*460 ; in car- 
rageen, about grammes 000-570 ; so that this last species 
contains more iodine than the former. — Ibid from Journ. 
de Pharmacie. 
