of Liquids to each other. 317 



the foundation of a theory which is applied to very interesting 

 phenomena. 



As soon as it is shown that the diminution of weight which a 

 sphere plunged into water experiences as a result of the viscosity of this 

 liquid is inversely proportional to the diameter of the sphere, and 

 when we know the amount of this diminution in a particular case, it 

 is easy to determine, by a very simple calculation, what will be the 

 diminution taking place in another case. 



For example, we can determine what will be the diameter of the 

 largest sphere of gold which will remain suspended in water on account 

 of the viscosity of this liquid. Proceeding in this manner, I found 

 this diameter equal to ^-^ of an inch. 



[This paper is translated from the French as it appears in the Biblio- 

 theque Britannique (Science et Arts), XXXIV. (1807), pp. 301-313, 

 and XXXV. pp. 3-16.] 



