

OB :n. 



IRE OP GRAN 



is measured like other Quantities by 

 ; arbitral tain Bpwm force be necessary 



vent a body from falling, thru another body v> 

 rot an equal force to Bust. .ave a weight 



tir*t. When two weights bare been 

 recognised to be equal, a body which require to sust. 



e equal to the sum of the two equal forces which would 

 sustain the two eaual weights, is said to have a weight doMe 

 ' he two equal weights ; and so on. 



ppears from experiment that the weight of a given body 

 is invariable so long as the bo; -tame place on 



mges wh i'ody is taken 



ic- \\ . -hall suppose therefore when we speak of 

 the weight of a body t ' nly remains at one place* 



When a body is such that the weight of any portion of it is 



proportional to the volume of that porti said to be of 



.-in /./ density of such a body is measured by 



h the weight of any volume of it bears to the 



weight of an equal volume of some arl 'losen body of 



nn ilrn- 



luct of the density of a body into its volume is 



called its 



en a body is not of uniform density its density at any 

 measured thus: : ;ht of a 



body taken so as to inclu >le that point to the 

 an equal volume of the standard bpdv; the /i'i . 



iiuiinished, is the 

 o body at the assumed poi 



