

17 





M - 



In (hi- <><{>. .r M. the only variable 



, M will l)c a maximum when ihr 



jr'j i^ maximum. N-.N- h-\\. .? v.v .. 



* + y - (L - ) - 



<- a constant sum, their prefer- 



maximum \\ hm the two variables are i- 



aximum \\hcn x - y. But when x - y, the 

 i u- n to th< <f gravity of the loading b 



. This prove* the centre of 



l>\ ih, f tin- -pan. 



.1 > n > I'UH'. 



In oid ;iply tin- rulr. a general cApieation for i 



R r . n follows that x - .', -ulmtitutr thr 



fj 



ndueol .. formula (9), and the value (IF. - >' 



" u- 7 '^. 

 r l "I 



p,. 





