On the floating of Cork Balls. 179 



diftance of about one inch from the fide, will 

 approach that fide is certain ; and it appears 

 that this and fimilar experiments have frequently 

 been made by philofophers, to prove the attrac- 

 tion of thefe bodies. To this I cannot alfent, 

 for different reafons; which I prefume are fup- 

 ported by the following experiments. 



The experiments are made in a vefTel of glafs 

 or earthen ware five or fix inches in diameter. 



Experiment I. If a clean cork be wet and 

 placed about one inch from the fide of the 

 containing vefi!el, it will approach the fide with 

 an accelerated motion. 



Experiment II. If two corks be placed 

 about an inch from each other, and at a fuffici- 

 cnt dift:ance from the fide, they approach each 

 other in the fame manner. 



Experiment III. Pour water into the vefi^el 

 till it is rather higher than the brim ; place the 

 cork clofe by the fide, and it recedes with a re- 

 tarded motion. 



Experiment IV. Sink a piece of metal in 

 the center of the veflTel, fo that the top thereof 

 may be above the furface of the water, the cork, 

 placed at a proper diftance, will apprgach it. 



Experiment V. Raife the water until the 

 metal is covered, and the cork will remain at 

 reft at any diftance from the metal. 



N 2 In 



