28 On the EXPANSIVE FORCE, &c. 



of time, and thrown to the diftance of 415 feet by this force ; 

 fo acling, the intenfity of the force will appear to be truly aflo- 

 nifhing. 



idly, We may hence form an eftimate of the quantity which 

 the water expands by freezing. For the longed cylinder of ice 

 was obferved to be 8^ inches without the hole ; to this add \\, 

 the thicknefs of the metal, or length of the hole, and the 

 fum, or 10 inches, is the whole length of the cylinder of ice, 

 the diameter of which is 1 /^ inches ; and hence its folid con- 

 tent is i.7 2 XioX.7854 cubic inches. 



But the diameter of the fpherical cavity, filled with water, 

 is 9tV inches; and therefore 9.i 3 x|x.7854 is the content of 

 the water in cubic inches. 



Hence then the content of the water is to the increafe by 

 expanfion, as §■ of 9.1 3 to 10 times 1.7*1 or as 502.4 to 28.9, 

 or as 174 to 10. So that the water, in this inftance, expanded 

 in freezing, by a quantity which is between the 1 7th and 1 8th 

 part of itfelf. 



C. H. 



VI. 



