OF IRON BEAMS. 



541 



haim. The weights were laid on, without the 

 intervention of a lever, aud suspended from a 

 saddle on the center of each beam, where the 

 deflections were taken. The figure below may 

 be considered as a side view of the beams, the 

 ribs at bottom of which were, as usual, uniform. 



EXPERIMENTS. 



80. 1st. Beam. — Distance between the supports^ 

 14 feet. 



Depth of beam in the middle, 15 inches. 



Depth of beam near the ends, 9} „ 

 Weight of beam (taken from the average weights 

 ,of several beams from the same model), 7 cwt. 

 3 qrs. 20 lbs. 



DimensioiM of tectioB. 



Thickness at A = | inch, 

 „ at C = 1 „ 

 DE = 1 „ 

 F E =5 inches. 



