>V OF IRON BEAMS. SUT 643 



^•*V^^ ptrto of ID Inch. 



18 tons 6 cwt. «<* ^K>» . - .675 



21 „ - - . .86 



23 „ It broke with this after sustaining 



the weight two hours. 



There were four other beams broken ; they 



were however more or less imperfect, and broke 



two or three feet from the center, where the 



flaws happened to be. 



82. Experiments made at Bradford in 1825. 

 3rd. Beam. — Distance between supports, 20 feet 

 9 inches. 

 Depth of beam in middle, 18 inches. 

 Depth of beam near the ends, 11} „ 



DimcnsioiiB of section in Inches. 



Thickness at A = 1, 

 i» » C = 1}, 



DE = U, 

 FE = 6. 



Weights in tons. Deflections in inches. 



13 1.16 



18 1.25 



19 with this it broke, after sustaining 

 the weight some time. 



83. We have seen (experiments 1 to 6) that 

 beams of this form of section will bear a greater 

 weight without breaking, than those that have 



