1 
sortie Minerals the Zeolite Family- 
1. Mesole, or the radiated mineral. The mesole lost in a red 
heat from 12. T hundredths of its weight, aitd at a white heat 
iS.S. The increase is owing to a small quantity of carbonic 
acid, of which it contains variable proportions, In a fine powder 
it gives at first a slight effervescence in muriatic acid, but in 
small grains it is not perceptible, i have found its composition 
to be, 
Silex, 
42.60 
Contains of Oxygen, 21.40 
No. of Equivalents, 15 
Alumine, 
28.00 
13.07 
9 
Lime, 
11.43 
3.19 
2 
Soda, 
5.63 
1.44 
i 
Water, 
12.70 
.11.29 
.8 
100.36 
Iti examining this result, it appears, that the lime exceeds a 
little that which it ought to be, in order to contain two times the 
oxygen of the soda, which arises from the presence of a small 
quantity of carbonate of lime. Neglecting this last, which is 
only ah accidental mixture, we find for the composition of me- 
sole the following formula, NS^ + The 
mesole differs from the mesolite in this^ that in the latter the 
soda and lime, as we shall presently see, are combined with three 
equivalents of sUex, NS^ H- 9,CS^. This difference induced me 
to repeat the analysis, with the mesole taken from another spe- 
eimen, and I found it confirmed. The nature of the alkali was 
examined in the following manner. The weights of the muriate 
being determined, I dissolved them in a very little water, and I 
mixed with it a solution of the double muriate of soda and pla- 
tinum, and when it did not form a precipitate, I dried the .mix- 
ture. I then dissolved the dry mass in alcohol, which leaves 
undissolved the muriate of potash and platinum, if the mineral 
contains any. If on this occasion we make .use of the muriate 
•of platinum, which is added in excess, the alcohol carries away a 
little of the salt, from the base of potash rendered soluble by the 
<excess of the muriate of platinum. The mesole liaS gi\ en me 
only insignificant traces of the double muriate of potash and pla^ 
tinum. 
2. Mesoline^ or the granular mineral. It is very difficult to 
obtain fragments of this mineral entirely pure, as the mesole 
adheres to it strongly on one side, and the lava on the Other. 
