OF IRON BEAMS. 515 



(2.2 inches broad in the middle, and tapering to 

 about half that width near the ends) was as 

 narrow as was admissible to support the beam. 



XXXIV. EXPERIMENT. 



Beam of common form, from the same model as 



before, and cast on its side for comparison. 



Distance between supports, 4 feet 6 inches. 



Depth of beam in its middle, 5f inches. 



. Weight of beam, 364 lbs. §f^ 



Dimeosiotu of section io locbes. 



Thickness at A = .27 



„ at B = .40 



„ at C z= .44 



FE = 2.27 



rn..; DE= .46 ," ^ 



Area of section = 2.921 inches. ■ '*^^ 



'id 



Weiehts Deflections in Retnrned to, 



in lbs. parts of an inch. (weights taicen off.) 



2078 



4148 - - - - .21 - - - - 



4493 - - - - .23 - - - - 



4838 - - - - -24 - • - - + 



5183 - - - - .26 - - - - .04 



5528 - - - - .27 



5873 - - - - .29 



6218 - - - - .31 



6563 - - - - .33 



6908 - - - - .35 - - - - .05 

 3x2 



