15196 lbs. = 6 tons 15 J cwt. With this it 



broke in the middle, throwing out a wedge, as 



in figure second to experiment 28. 



Here a c, the length of the wedge = 6.9 inches 

 bdf its depth = 2.25 „ 



XXXIII. EXPERIMENT. 



Distance between supports, 9 feet. Depth of 



beam, 10| inches. 



Weight of beam, 244 lbs. 



Dimensions of section, (fig. experiment 80.) 



Area of top rib 2.2 x .33 = .73 inches. 

 Area of bottom rib 7.6 x .75 = 5.70 „ 

 Thickness at A, .15 

 „ at B, .38 



f, at Cy .35 



