ADVERTISEMENT. V 



Improvements which may be readily applied to the 

 fhip-pumps in common ufe, will be moft likely to be 

 adopted by feamen, and introduced into general practice. 



Papers on thi& fubjedl will be received, till the firfl day 

 of January, 1797. 



IV. 



For the beft conftrudion or improvement of ftoves, or 



fire-places, A premium of Jixty dollars. The principal 



end which the fociety have in view, in propofmg this 

 fubje£l, is the benefit of the poorer clafs of people, efpecial- 

 ly of fuch as live in towns, or other places where fuel is 

 dear. To anfwer this end, the flove fhould be cheap, and 

 of durable materials ; fhould afford the neceffary degree of 

 a falubrious and durable heat, with the leaft expenfe of 

 fuel poffible ; and fhould be capable of being employed 

 both for the purpofe of warming the room, and cooking 

 provifions for the family. — The fociety have been inform- 

 ed, that ftoves made of brick are, in many refpedls, fupe- 

 rior to thofe made of metal ; efpecially, in the faving of 

 fuel, and prefer ving a more equable degree of heat. 



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

 of Januaiy, 1797. 



V. 



For the befl method, verified by experiment, of pre- 

 venting the premature decay of Peach-trees, A premi- 

 um of Jixty dollars. 



Papers on this fubjedt will be received, till the firft day 

 of January, i 798. 



VI. 



For the beft experimental treatife on native American 

 vegetable dies ; accompanied with an accurate account of 



the vegetables employed— A premium of ?iinety dollars. 



Papers 



