Dpinion on Hydrometers, by Dr. Hare. 115 
dently calculated by the great architect of the universe, to 
Keep nature in perpetual motion. But without endeavouring 
to penetrate into the secret views of Providence, let us study 
e means of employing advantageously, the powers offered 
with infinite goodness to human industry; for in the end, 
practical utility will be found to be the best part of philoso- 
phy, and the only one which we may cultivate with pleasure 
and profit.” 
Art. X.—Opinion on Hydrometers; by Ropert Hare, 
M. D.. Professor of Chemistry in the University of Pena- 
sylvania. 
deputes the choice to the collector of this port, with the as- 
sistance of the naval officer, and three such persons as he 
may deem best qualified to judge. Being called on, under 
these circumstances, to give an opinion, I beg leave to pre- 
mise, that, the instruments which have been heretofore em- 
ployed, in the assay of spirits, have either been contrived in 
England, with a particular view to the duties there levied, or, 
have been modifications, made in this country, of i ‘ 
so contrived. Hence, none have been constructed, ap a 
by our 
due regard to the manner in which duties are i 
| than forty years, since our political 
independence was achieved, we have still continued to be de- 
pendent on England for our best mathematical instruments 5 
as it was not towards such contrivances that the enterprise pe! 
a 
