Vlii ADVERTISEMENT. 



intcreft arifing therefrom may be difpofed of, in annual 

 premiums, to the authors of the beft difcoveries or moft 

 ufeful improvements, relating to Navigation, or to Natu- 

 ral Philofophy, mere Natural Hiftory only excepted ; — 

 the following are the rules and conditions, adopted by 

 the fociety, for the difpofition of the propofed premiums, 

 in conformity to the intention of the Donor, viz. 



I. The candidate fliall fend his difcovery, invention or 

 improvement, addrefled to the i'refident or one of the 

 Vice-Prefidents of the fociety, free of portage or other 

 charges ; and fliall diftinguilh his performance by fome 

 motto, device or other fignature, at his pleafure. Toge- 

 ther 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. 



II. Perfons of any nation, fedl, or denomination what- 

 ever, fhall be admitted as candidates for this premium. 



III. No difcovery, invention or improvement fhall be 

 entitled to this premium, which hath been already pub- 

 liflied, or for which the author hath been publicly re- 

 warded elfewhere. 



IV. The candidate fhall communicate his difcovery, in- 

 vention or improvement, either in the Englifli, French, 

 German, or Latin language. 



V. All fuch communications fliall 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 infpedlion of fuch mem- 

 bers as fhall defire it. But no member fliall carry home 

 with him the communication, defcription or model, ex- 

 cept the officer to whom it fhall be enti-ufted : nor fliall 

 fuch officer part with the fame out of his cuflody, with- 

 out a fpecial order of the fociety for that purpofe. 



VI. The 



