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ADV ERPS SEM En FT: 
M. JOHN Hyacinth De Magellan, in London, having fometime ago 
offered, as a donation, to the American Philofophical Society, held at 
Philadelphia for promoting ufeful knowledge, the fum of two hundred 
guineas, to be by them vefted in a fecure and permanent fund, to the 
end that the intereft arifing therefrom fhould be annually difpofed of in 
premiums, to be adjudged by the fociety, to the author of the beft dif- 
covery, or moft ufeful invention,: relating to navigation, aftronomy, or 
natural philofophy (mere natural hiftory only excepted) and the fociety 
having accepted of the above donation, hereby publifh the conditions, 
prefcibed by the donor,-and agreed to by the fociety, upon which the faid 
annual premiums will be awarded. 
1. The candidate fhallifend his difcovery, invention or improvement, 
addreffed to the Prefident, or one of the Vice Prefidents of the fociety, 
free of poftage or other charges ; and fhall diftinguith his performance 
by fome motto, device or other fignature, at his pleafure. Together 
with his difcovery, invention or improvement, he fhall alfo fend a fealed 
letter, containing the fame motto, device or fignature, and fubfcribed 
with the real name, and place of refidence of the author. 
2. Perfons of any nation, fe& or denomination whatever, fhall be 
a as candidates for this premium. 
. No difcovery, invention or improvement fhall be entitled to this 
premiuth which hath been already publifhed, or for which the author 
hath been publicly rewarded elfe where. 
4. The candidate fhall communicate his difcovery, invention or im- 
rovement, either in the Englifh, French, German or Latin language. 
5. All fuch communications fhall be publicly read, or exhibited to 
the fociety, at-fome ftated-meeting, not lefs than one-month previous to 
-the day of adjudication, and fhall at all times be open to the infpection 
of fuch members as fhall defire it. But no member fhall carry home 
with him the communication, defcription or model, except the officer 
to whom it fhall be intrufted; nor fhall fuch officer part with the fame 
out of his cuftody, without a fpecial order.of the fociety for that pur- 
pofe. 
6. The 
