\WB AREA. ] 1 7 



f A, which determines the abaci M* of the 

 of gravity of a portion of a parabolic area beginning 

 at the vertex. Also 



, M *& |V(y-V) 



" " 2 Jaf&dx " //x^x ' " } (/J~"^ 



Whenc-0, y- 



2. Let the curve be an ellipse whose equation is 



.fore // 

 And 







I 



^7 * _ ox 

 8 \ <>/ 



