634 THE STRENGTH 



In experiment 21, 20617 lbs. bent the beam 

 .54 inch, and 21009 lbs. broke it. 

 ^[./. 20617 : 21009 :: .54 : .bb inch = ultimate 

 deflection. 



In the preceding experiments, the height of 

 the beams was elliptical; in all those that follow 

 it was uniform throughout. 



In experiment 15, 16401 lbs. bent the beam 

 .53 inch, and 16905 lbs. broke it. 



.-. 16401 : 16905 :: .53 : .55 inch = ultimate 

 deflection. 

 In experiment 16, iron of different quality. 



In experiment 18, 18265 lbs. bent the beam 

 .43 inch, and 19441 lbs. broke it. 



.-. 18265 : 19441 :: .43 : .46 inch = ultimate 

 deflection. 



In experiment 20, 22969 lbs. bent the beam 

 .50 inch, and 23249 lbs. broke it. 



.-. 22969 : 23249 :: .50 : .51 inch = ultimate 

 deflection. 

 BEAMS 7 feet BETWEEN SUPPORTS. 



In experiment 23, where the depth was 

 4.1 inches, 12815 lbs. bent the beam 1.08 

 inches, and 13543 lbs. broke it. 



.*. 12815 : 13543 :: 1.08 ; 1.14 inches z= ulti- 

 mate deflection. 



In experiment 24, where the depth was 5.2 

 inches, 12087 lbs. bent the beam .63 inch, and 

 15129 lbs. broke it. 



