iv ADVERTISEMENT. 



At a Jlated meeting of the Society, held at their Hall, De- 

 cemher 19th, iboo, the follozving Premiums "j}ere pro- 

 pofed : 



I. 



For the moft fimple, convenient, and effedlual method 

 of ventilating a fliip at fea, without manual labour ; if 

 fuperior to any now in ufe, a premium of one hundred 

 dollars . 



Memoirs to be delivered by the firft of April, 1B02. 



II. 



For the cheapeft and moft effedtual method of rendering 

 common oil fit to be burned in the Argand lamp, either 

 by purifying the oil, or by an improvement in the lamp : 

 a premuun of thirty-fve dollars. 



Memoirs to be delivered by the firft of April, 1802. 



III. 



For any funple and efFedlual method of rendering tur- 

 pentine, or any other cheap inflammable fubftance, a fit 

 fuel for ftreet or houfe lamps, or a proper material for 

 candles: a premium oi forty dollars. 



Memoirs to be delivered by the firft of April, 1802. 



IV. 



For the heft experimental efTay on the native red dies of 

 the United States, accompanied with fmall fpecimens of 

 the died fluffs : a premium of one hundred and fifty dollars. 



Memoirs to be delivered by the firft of January, 1804. 



General Conditions for the above Premiums : 



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

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



place 



