OF IRON BEAMS. 517 



Dtmenalont of •eetion la toebct (fi(. Uut experimeot.; 



Thickness at A = .27 >^^^ 



ff at B = .365 

 „ at C = .43. 



D E = 2.26 

 FE =z .47. 



Area of section = 2.837 inches. 



Weight. D.tectlon.ta Returned to, 



in Ib«. part* of an inch. (weijlita Ukeo off.) 



2078 - - - . .09 - - - - 

 1 4148 18 .... ^ .^ 



I- 4493 20 - - - - 4- 



^ 4838 - - - - .23 - - - - + 



5183 - - - - .25 - - - - 4- 1 



5528 .27 - - - - .02 



^ 5873 .29 - ... .03 



! 6218 - - - . .32 .05 



- 6563 . .^•r^^:^.35 .06 '' 



6908 .38 . .06 '^ 



^ 7253 . - - - .39 .06 ^^ 



7943 - - - - .42 «' 



8288 - - - - .44 ^ 



8540 - - - - .45 - ... .08 " 



8792 - - - - .46 - 



9044 lbs. = 4 tons, J cwt. It bore this 



weight about half-a-minute, and then broke in 



the middle, by tension, as in every other instance 



in these beams. 



