HYDKOSTATICS. 183 



tion, in which the tendency to remain is equal to 

 nothing. 



ATWOOD, Phil Trans. 1796, p. 63. 



269. If a rectangular parallelepiped float in a 

 fluid, with its altitude a perpendicular to the sur- 

 face ; if its breadth be 6, and its specific gravity n, 

 that of the fluid being 1, its stability will be as 



b *n(I n)a\ 



When it has no stability, *L n (1 n) a 1 = 0, and 



If n = - > as is nearly the case with fir, 



a = & = &!/ 1 = TT neaxl y- The truth of 

 T- V 3 6 J 



this conclusion may be shewn by experiment. 



ATWOOD, ubisupra y p.61. YOUNG'S Analysis of tfo 

 Principles of Natural Philosophy, p. 212. 15. 



270. As the force impelling the floating body in 

 its vibrations, is proportional to the sine of the in- 



clination 



