Art - 19- RESILIENCE. ]7 



substitute the elastic limit for s in equation (4). The elastic 

 resilience of a steel having an elastic limit of 40000 Ibs. per 

 square inch equals ^^i^ = 27.6 inch-pounds per cubic 

 inch. The elastic resilience of a cast iron having an elastic limit 

 of 12000 Ibs. per square inch equals - * 20 * 1 2f) = g.p j nch . 

 pounds per cubic inch 1 . 



'For the resilience of beams see Art (88), ^nd for a discussion 

 of the whole subject, see Chapter VI of Johnson's Materials of Con- 

 struction. 



RETURN TO 

 OT. of AF 



