808 
latter to one of the former. Fhe num- 
ber of tubs is in general 24, which they 
place in three rows, eight in each row; 
and into every tub is thrown ei 
bufhels of wood afhes, and f-« of earth ; 
goo gallons cf water, being ia 
through the firft row of tubs, are poured 
on the fecond, and afterwards on the 
third; and, the firfl row being reple- 
nifhed with freth materials, the liquor is 
paffed through this oe having 
thus pafled through £ four rows of eight 
tubs, and bemg reduced to. 180 gallons, 
it is carried to the boiler.. During. the 
boiling, the hxivium 1s carefully fcum- 
med, ‘and when a pellicle begins to form 
on the furface, a workman is conftantly 
employed with a perforated ladle to take 
out the marine fale, which begins to form 
and fall to the bottom of “abe boiler : 
when the lixivium is fo far evaporated, 
that a drop of it will congeal ona cold 
tron, it is taken out and thrown into a 
tub for the Sirgen cf the marine falt 
and other dregs to fettle; and after 
flanding about half an hour, is drawn 
of, while warm, into fhallow eres 
pans, and a in a cool place for the falt- 
petre to cryftallize. ‘The produce of 
this operation is about 130 pounds of 
brown falt- sone which is fold to go- 
vernment for three-pence-hal lfpenny per 
pound, and carried to the gue to be 
refined. ‘The mother liquer remaining 
after the cry fallization, is Eee mead 
water, and poured upon frefh parcels of 
arth in the tubs i ae the earths, when 
dry, are {pread about to receive any 
putrid liquor, ihe ean be procured to 
throw upon them, and in a few months 
are fit for ule a fecond time—Vol. I. 
p- 248. 
XIU. SaL-AMMONIAC. 
In July, 1792, apatent was granted 
to Mr. W. Menifh, of London, Che- 
mifit, for an improved method of mak- 
ing fal-ammoniac and Glauber’s {alts ; 
the procefs of which is, to mix an 
quantity of fulphate of lime (1. e. felenite, 
gypfum, or plafter of Paris) reduced to 
owder, with {uch apropertion of volatile 
leali, as will be fufiicient to faturate the 
acid, and decompcefe the gypfum; in 
fome hours, the decompofition will be 
completed, the lime being precipitated, 
and the acid uniting with the ammoniac : 
after this, the pes is to be completed 
the ufuel way; that is, the fulphate of 
ammcniac being united to a folution of 
common falt, a double decompofition 
will tale place ; the fulphuric acid of 
the fulphate of aramoniac will unite with 
Botanic Infiitution. 

ek 
[ April i 
the mineral alcaline bafis of the fale, 
forming Glauber’s fale; and the ammo-. 
-niac will unite with the acid of the fale, 
forming muriate of ammoniac, or the 
common fal-ammeniac.—Vol. I. p. 303. . . 
[ To be continued. | 
SS , 
; 
For the Monthly Me fagaxine. 
ACCOUNT OF THE NEW Bor ANIC 
INSTITUTION IN [REGAND. 
LS Dublin Society having taken fixe 3 
teen acres of ground, at Glafnevin,’ 7 
for the purpofe of forming a botanic gar-" 5 
den, purfuant to act of parliament, for . 
promoting a fcientific knowledge in the = 
various branches of agriculture, have 
made fome progrefs in laying them out, 
purfuant to the following report from: 
their committee of agriculture 
The gardens at Glafnevin to be Jaid 
out as follows : 
1. A Hortus Linnzenfis, divided into. 
three parts: the Herbaceous ( Herbarium). 
he Shrubs, (Frutcetum.).. The Trees, % 
(Aréoreium.). Each plant therein to beg 
arranged according to-its ‘clafs, order, 
genus, and fpecies, beginning with the J 
firit.clafs, and onae amie revularly to 
the laft clafs of cryptogamia, for which a 
feparate divifion of ground is to be al- 
lotted. 
In each of thefe divifions every plant 
is to have a painted mark affixed to it, 
which is to fhew—The number in the 
Glafnevin catalogue—The clafs and or- — 
der—The generic and fpecific name,all in 
black on a white ground, and the Englifft © 
name in red, 
“Wherever a genus contains herbs and © 
fhrubs, or trees and fhrubs, a mark will 
be placed in its proper order in the hers © 
barium and fruticetum, referring from — 
one to the other, andfoin the arberetum, 
in order to fhow the regular continuation 
of the fyftem; and, in like manner, wheres i 
ever in the Herbarium any clafs or order 
is omitted, as nct containing any herb, or © 
any herb not hardy enough for the open ~ 
air, a mark will be fixed in its proper — 
place, to fhow why it is omitted. v : 
In the arboretum, which is prepofed — 
to occupy the weft and fouth fides of the 
ground, and to forma fkreen of about 
five or fix perches wide, with a ad 
gravel way through the centre, and the ~ 
grafs kept as fine asa bowling-creen's 
ey 
ae trees are to be planted from ‘twenty 

_to thirty feer apart, and where there is ‘| 
very delicate or choice {pecies, two may” 
be planted, left one fhould fail ; the in- 
termediate 
