a42 
National Inftitute, 15th Germinal, 1798. 
fO&s 
Sitting of the 15th Germinal, or April ath; 1798. 
Notice of the labours of the Clafs of Phy- 
Jjical and Mathematical Sciences, during 
ihe fecond Quarterly Sitting of ihe 6th 
year, by Citizen LEFEVRE GINEAU. 
PHYSLCAL. PART. 
HE labours prefented to the clafs of 
phyfical fciences of the Inttitute, 
by its members and by its aflociates, 
during the laf quarterly fitting, have had 
chiefly for their object Rural Geconomy, 
the Veterinary art, and Chymiftry. 
Some experiments recently made upon 
horfes, fheep, goats and rabbits, prove 
that they die almoft inftantly and with 
convulfions, aiter eating a certain quantity — 
of leaves and berries of the yew-tree. Ci- 
tizen DAUBENTON confiders this tree as 
dangerous, and thinks it ougut not to be 
tranf{ported into countries which have it 
not by nature, and that it would be bet- 
ter to defircy than to cultivate it.. 
A memoir of Citizen CETs, on the 
advantage of employing analogy in the 
natural. iciences, and on its application 
to Botany for the progrefs of Rural Cico- 
nomy, has for'its object to prove that 
the properties.of bodies being the refult 
of their organization, the more relations 
there are between beings, the more the 
ufes to which we can apply them are af- 
fimilated. 
Citizen GILBERT has proved the ne- 
ceflity of {ubmitting to comparative ex- 
periments all the operations of agricul- . 
ture, in order to give the rural fcience all 
the progrefs.of which itis yet iufceptible. 
He thinks it would be neceflary to form 
rural eftablifhmentss particularly devoted 
to the refearch of the belt methods, both 
of the culture of vegetables, and the 
amelioration. of the brecd of domettic 
animals. 
A memoir of Citizen TENON has. for 
its object the comparifen of the different 
ways in. which manducation is per- 
formed in. man, in the horfe, and in the 
~ elephant. 
Citizen CHABERT has communicated 
fome reflections on 2 difeafe ef the horfe, 
known by the name of immebility, which 
has not hitherto been defcribed, and 
which bears a frong analogy with that 
known in man by the name of cataleply. 
Citizen Huzarp has made jome re- 
flections en an offeous humour 
fometimes {pring on a horfe’s ham, after 
fome violent effort; he confiders its form- 
ation, and treats of the principle which: 
involves the bef method of curing it. 
‘itizen TESSIER gave’an account of 
= man that had beew buried during eight 
which . 
days under fome ruins, in digging a pits. 
and who was taken out alive. The 
‘author indicates the means which fhoulé 
be emplayed to prevent a-imilar accident, 
and thofe by which it may be remedied: 
when it has taken place. 7 
Citizen LELIEVRE announced the re- 
cent difcovery in France, of the fulfate 
of fironthian in a ftriated mafs. Jt was 
about the depth of five metres (from 1¢ 
to 16 feet) in a clay ground, which has- 
een digging for fome years paft at Bou- 
vron, near Toul, that a mafs of this ful 
fate was found. 
Citizen DeLomtiev alfo produced fome 
fulfate of cryftallifed ftronthian, which he 
had collected in his Tour of Sicily,‘and 
which,-tegether with the preceding, has 
been analyfed by Citizen VAUQUELIN. 
It.is weii known, that the nitro-muri- 
atic acid is the true folvent of gold, and 
that this metar may be taken from its 
folution by the fulfuric ether. Citizen 
SAGE fhewed the gold reduced, fwim-— 
ming between the ether and the nitro- 
muriatic acid, under the form of net- 
work, leaves, and at the bottom of the 
decanter in fimall brilliant maffes, on 
which were obferved triangular lamine, 
elements of the cryftallization of that 
metal. ; 
Citizen CHAPTAZL read a memoir on Z 
new method of making verdigris. This 
new proceis, ufed at Montpellier for fome 
years patt, confifts in fermenting the hufks 
of the grapes (i.e. the grofs fubftance 
after prefling,) and itratifying them with - 
laminag of copper, to develope the metal< | 
lic oxyde, called verdigris. This me- 
thod has the advantage over the antient 
one, of being more eafy in execution, and 
of conducing greatly to .ceconomy, as 
wine is no longer employed. in it. 
_Some experiments of the fame author 
prove alfo, that white lead may be fabri-. 
cated by a fimilar method; which leads 
to hope that it will not be long ere this. 
valuable mode of fabrication will be rea— 
lized in France. vio 
The fame chemift read another memoir 
on the acetate of copper, or cryftals of 
Venus. He alfo communicated feveral. 
experiments to oxydate copper with more 
advantage, and to render it by this means 
foluble in acetovts acid.. 
Citizer Berthollet communicated a no- 
tice on a particular acid, which he has 
lately difcovered, and to which he gives 
the name of zooinic acid, as being effen- 
tially extracted from animal fubftances. 
A inemoir of Citizen DoLOMIBU, .on 
gertain: 
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