ee ee 
Ye ee De eT eet ee ny ae al - eeu 
S. W. Johnson on some points of Agricultural Science. 75 
L 
Si0s, - - : 47°44 48°31 
ee 21°04 
CaO, - a ay 6°65 
Po ee 0°64 
NaO, - - . 0°42 5°40 
HO, =o se Seogeyg 18°38 
99° "99°75 100- 100:37 
Nearly one-half the lime of the original mineral is toa 
by soda. A loss of water also has occurre he solution sep- 
arated from thé mineral, contained nothing but a lime and 
chlorine, and the latter in precisely its original qua 
y acting on mo with dilute chlorid pan re (10 
grams to 500 c. ents for 10 days, the mineral was alte 
and contained 3°33 per cent of ammonia. Digested 21 days, 
the mineral, dried at 212°, yielded 6°94 per cent of ammonia, 
and also had lost water. 
ese ammonia-chabazites lost no ammonia at 212°, it escaped 
ammonia. 
As in the instances above cited, there occurred but a partial 
acement of lime. Hichborn made correspondin — with 
solutions of carbonates of soda and ammonia, in 
soda for lime when digested in a solution of chlorid of calcium; 
in solution of chlorid of potassium both soda and lime were 
separated from it and replaced by poral So, the ammonia- 
chabazite in solution of chlorid of ea rt exchanged ammonia 
for lime, and in solutions of chlorids of — m_ and sodium, 
both ammonia and lime passed into the re “The ammonia- 
chabazite in solution of sulphate of magnesia, lost ammonia but 
not lime, though doubtless the latter base would have been 
found in the liquid had the digestion been continued longer. 
It thus appears that in the case of chabazite all the protoxyd 
bases* may mutually replace each other, time being the only 
* Eichhorn’s observations indicate that the eoepinet (basic?) water of a silicate 
is also liable to we of one as removed. May no . the sal — e water of 
ee gee the loss by ignition in mineral, be due to Seeets thet hes tered i 2 
combination in the same manner? 
