learned Societies. 315 



ropean poffeffions, will be rewarded by the Society with 300 

 dollars. The papers rauil be accompanied with proper mo- 

 dels or accurate drawings. 



2. For the eonftruction of harnefs, by which horfes, with- 

 out being confined or hurt, may be able to draw in the eafi- 

 eft manner, particularly when employed in agriculture, as 

 in ploughing, harrowing, rolling, drawing corn-carts, &c. ; 

 and alfo in more laborious works, fuch as drawing ftone- 

 carts, waggons, cannon, &c. ; the Society will beftow a re- 

 ward of from 100 to 300 dollars, in proportion to the im- 

 portance of the propofed improvements. 



The author muft write his name and place of abode in a 

 fealed note, inferibed with fome device ; and the papers with 

 the fame device muft be tranfmitted, poft paid, before the 

 end of June 1799, to Profeffor Abildgaard, fecretary to the 

 Society. 



HOLLAND. 



The fecond Tevlerian Society have propofed the following 

 prize queftions for the year 1799 : 



As it is of great importance towards the improving and 

 extending every branch of phylics that the prcfent ftate of 

 our knowledge in that refpeel fhould be afcertained, and that 

 every thing which has been fufficiently proved by experience 

 fhould be accurately diftinguifhed from what may be con- 

 fidered only as conjecture, the Society requires to know what 

 is the prefent ftate of our knowledge in regard to the aqueous 

 vapours of the atmofphere ? — How far can we explain, on 

 well founded experience, by what caufes water is received 

 into the atmofphere in the form of vapour, or in any other 

 manner, and retained there ; and to what caufes is it to be 

 afcribed that the water retained in the atmofphere is difen- 

 gaged and falls down under different forms ? Moreover, can 

 ♦ill aqueous vapours be afcribed merely to the difengage- 

 pient of the water in the atmofphere, or have any obferva- 



tiona 



