N I T
N I T
( 162 )
to lixiviation : by evaporation of the fluid therewere depofited 4 grains of muriated foda; andthe fmall refidue of mother water afforded bythe addition of carbonated potafh 53 grains moreof fait, which appeared to be muriat of potafh,with perhaps a flight admixture of nitre, for
PttX } Muriat ° f foda .
Potafh } Muriat of Potafh and a little nitre
although it did not detonate in the fmallcftdegree with charcoal, yet by fulphuric, acidit gave out acid fumes, in which the odour ofnitro-muriatic acid was juft perceptible.
Hence 100 French lbs. of this chalk afford
gros. grains.
- - - - ° — 3 2
... 5 — 64
6 — 24
A fimilar fpecimen was taken with the fame precautions from an adjoining gallery and lixiviated,the faline contents of which calculated on 100 lbs. amounted towithout *1 Selenite in fmall quantity
Potafh J Mother water, which gave gros. grains,
with 1 Impure nitre - -- -- -- -- - o — 68f
Potafh J Muriat of potafh - -- -- -- -- 1 — 38
2 — 341
Another fpecimen of chalk, taken from near the fummit of a rock after having removed thefurface to the depth of about two feet, afforded by lixiviation from 100 lbs.
without 1 A little felenite
Potafh j Mother water, which gave oz. gros. grains,
with 1 Nitre - -- -- -- -- 1 — 2 — 24
Potafh J Muriated potafh ------ o — 1 — iof
1 — 3 — 3 4f
A fpecimen of chalk taken from the middle of a rock, after having removed the furface to tliedepth of two feet, afforded from 100 lbs.without "1 A little felenite
Potafh J Mother water, which gave oz. gros. grains,
with 1 Nitre --------- 5 — 5 — iqf
Potafh J Muriat of potafh ______ o — 1 — 70
5 — 7 — 1 7 t
A fhallow cave that had been dug out of the chalk rock a confiderable time before, wasobferved to be lined with faline effforefcences: after the outer furface had been removed t®the depth of three inches, a fpecimen was taken, which afforded from 100 lbs.
lbs.
OZ.
gros.
grains.
without'
(Nitre ------
0 —
10
— r
— jaf
Potafh
| Mother water, which gave
with ^Potafh J
>Nitre ------
O - -
10
— 1
— 52 x
1 —
4
— 3
— 33
9B