298 Learned Societies. 
confequences, more or lefs confirmed by experience, can be 
deduced from it in regard to the practice of medicine? 
3. How far has the new chemiftry contributed to afford an 
accurate idea of the mode of aétion of different internal and 
external medicines, which have beer long ufed, or only lately 
recommended? And, what advantages can arife from a more 
accurate knowledge of this point in regard to the treatment 
of certain difeafes ? 
As fome learned men have mtroduced hypothefes built om 
too weak a foundation, ‘in regard to the application of the 
pr inciples of the new chemiftry to phyfiology, pathology, 
and therapeutics; and as this is highly prejudicial to the 
progrefs of thefe feiences, to which the new chemiftry, how- 
"ever, promifes fo much light, if, according to Lavoifier’s rule, 
we ‘tnt nothing in chemiftry, or the eniployident of che- 
nical principles, but what is founded on decifive experiments, 
the Society requires, that thofe who are inclined to anfwer 
thefe queftions will make an accurate diftin@tion between 
what is proved, and what is merely hypothetical ; and that, 
in regard to hypothefes, the candidates will confine them- 
felyes to a bare mention of them, and of the few grounds on 
which they reft; becaufe the principat point which the So- 
ciety withes to obtain is, that thofe who follow the medical 
or chirurgical profeffion im Holland, and who are not yet 
fufficiently acquainted with the progrefs of the new chemif- 
try, and its application, on well-founded principles, to phy- 
fiolocy, pathology and therapeutics, will procure fach works 
as may be beft calculated to inform them what hight the new 
chemifiry has actually thrown on thefe fciences ; ; and what 
fa&ts are founded on too weak grounds; and what have been- 
too rafhly adopted, or are ftill too doubtful to be depended’ 
on. Each of thefe papers will be examined feparately: thofe, 
therefore, who with to anfwer more than one quettion, mnt 
fend a paper for each. 
II. The Society requires a plan, capable of being carried 
into execution, for rendering productive the large unculti- 
vated difiriéts of the republic, particularly in Guelderland,, 
Overyffel, Drenathe, and Dutch Brabant. 
III, The 
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