458 
Spinoza 3; the fecond and Jaf volume 
will follow immediately. This edition is 
perfeétly complete, and very correét. The 
Editor is M. Pau.us, Profeffor of Divi 
nity, well-known for his knowledge in the 
Oriental languages, and for his Commen- 
tary on the New Teftament. As there 
has never been hitherto a complete collec- 
tion of the works of that great philofo- 
pher, and as fome of them had become 
rare, this information muft be equally in- 
terefting to the literati, and to all who are 
Jovers of philofopby. 
Citizen Sequin, an Affociate Mem- 
ber of. the National Inftitute, lately 
read two Memoirs relative to ciana- 
bar, in which that chemift endeavours 
to prove, that etjiops and cimmabar are 
only a compofition of fulphur and of 
mercury, without oxygen and without hy- 
drogen; that thefe two iubftances onlydiffer 
from one another in the proportion of 
their principles or conftituent parts, and, 
above all, in the degree of union of their 
molecules or particles ; that this. propor- 
tion, and this degree of union, are invari- 
able in cinnabar ; and, on, the contrary, 
very variable in ethiops ; and, laftly,.that 
cinnabar is a compound of thirteen. parts 
and one-third of julphur, and of eighty- 
fix parts and two-thirds of mercury. 
CitiZn Sequin has. likewife lately 
read to the Infiitute,, a. Memoir on Co- 
lophony, a. fort. of hard rofin, ,with 
which the firings of mufical inftrumests 
are rubbed. After having fhewn that 
very good colophony is only a refin per; 
feGtly purged of effential oil, and from 
which a portion of its hydrogen has. beea 
taken ; after having likewife, proved;that 
the colcpnony uled in commerce contains 
more or lefs. of eflential oil, and confe- 
quently 1s more or icis defective ; he has 
given the following recipe to, obtain, it 
very good:—Melt fome pitch in -boiling 
water, difiolve it in alkohol; introduce into 
this drflolution fome, muriatic oxygenated 
acid 3 pour in fome water to feparate the 
rofin from the ether; which colleéts or 
forms; diffolve the rofin in caufiic alkali; 
and precipitate it .by acetic acid. By 
this procels, he adds, you will compound 
a very pure colophony, tranfparent, very 
friable, eafy te reduce to fine and very dry 
powder: in fine, poffeffing all the-quali- 
ties that, conftitute good colophony, and of 
which Citizen Sequin is fo much the bet- 
ter qualified a judge, as he has praétifed 
the art wherein this fubftance is made ufe 
of, as well as cultivated the {cierice that 
produces it. 
Literary and Philofophical Incelligenve, 
[ Dec. 1, 
Mines.—TVhe Confuls of the French 
Republic have. ordered, by an» arréte of * 
the 23d of Pluviofe, year 10, onthe Re- 
port of the Minitter of the Interior, the 
eltablifhment of two , practical .fchoo!s, 
for the exploitation and digging of mines, 
and the treatment, of. mineral fubftances. 
The one 1s placed. in;the Department of 
Mont Blanc, in the diftrid&: Des, Moutiers,. 
at the lead-mines,.of Pezay; the otherin 
the Department of La Sarre, at the forges 
of Geiflautern, near Sarrebruck, > The 
firft of thefe {chools will offer extenfive 
and various means, of inftruction, chiefly 
with a view.to metallurgy 5 it-is placed-on 
a very rich lead-mine, near to. the filver 
one of Allemont, as likewife to the fpathic 
mines of iron of the Lfere and .of Mont 
Blanc; to the works in which thefe valu- 
able metals are treated, in order to obtain 
from them a fieel analogous to that of 
Carinthia and of Styria, and at a very 
little diftance from the falt-pits of Con- 
flans and of Moutiers. The pupils will 
have opportunities of obferving the great 
geological phenomena, which the chain ef 
the Alps prefents; they, will have before their 
eyes the. different ircumftances, which 
accompany the numerous ftrata of mine- 
rals which it prefents,in thofe impofing 
maffes, briftled with afperities, and of the 
profound rents or difleverments, which an- 
cient revolutions of the globe have pros 
duced there.. The. furnaces, forges, eop- 
per-works,, tin-works, of \Geiflautern, 
and. the iteel-works of Goffontaine, will 
enable the pupiis of the {chool placed in 
the Department of, the Sarre, to purfue 
the operations relative, to the melting of 
minerals, of iron, and to the different mo- 
difications of that metaly. .They will fix 
their attention on,the economy and the 
improvements. which may be extended to 
thofe works. . The fiate of prefervation 
of the woods, the low price of combufti- 
bles,and the diverfity and abundance of mi- 
neral fubftances found there, have rendered 
this department the moft proper for 
fuch fabrics as have thofe materials for 
their objeét. Thefe fabrics are alreas 
dy there in great numbers, and cannot 
but increafe. The rich mines of pits 
coal in the environs of — Sarrebruck 
will offer to the pupils regular ex- 
ploitaticns in the labours wherein they 
will be exerciied. They will be able to 
vifit frequently the mines of quickfilver, 
of lead, and of copper, of Mont Ton- 
nere, as well as.the beautiful falt-works of 
Kreuftnack. They will be fent, without 
any great charge, to the collieries of 
Efchweiller, 
