VI ADVERTISEMENT. 



Papers on this fubjed will be received, till the firil 

 day of February, 1798. 



VII. 



For the beft conflrudion or improvement of lamps; 



cfpecially, for lighting the ftreets A premium of fifty 



dollars. 



Papers on this fubje£l will be received, till the firft day 

 of April, 1797. 



GENETiAL CONDITIONS. 



1. Every candidate, along with his performance, is to 

 fend to the fociety a fealed letter, containing his name and 

 place of abode ; which letter fliall never be opened by the 

 fociety, except in the cafe of a fuccelsful candidate. 



2. No performance, invention or improvement, on any 

 of the fubje(3:s propofed, for which a patent or any other 

 reward fliall have been obtained, before prefenting it to 

 the fociety, fliall be confidered as entitled to the premium. 



3. In lieu of the money which fhall be awarded by 

 the fociety, as a premium, any fuccefsful candidate fliall 

 have it in his option to receive a gold or filver medal, or 

 piece of plate, with a fuitable micription, of equal value. 



4. The fociety referve to themfelves the power of giv- 

 ing, in all cafes, fuch part only of any premium propofed, 

 as the performance ihall be adjudged to deferve ; or, of 

 withholding the whole, if it fhall appear to have no 

 merit above what may have been already publifhed on 

 the fubjedl. The candidates may, however, be alfured, 

 that the fociety will always judge liberally of their fe- 

 veral claims. 



A number of papers have been received on the feveral 

 fubjedls above ftated. But the fociety have as yet forborne 

 the adjudication of any premium, except that offered for 



the 



