494 THE STRENGTH 



The beam not having been broke at this 

 time, the experiment was resumed two days 

 afterwards, when the beam seemed nearly 

 straight again, and the deflections were those 

 from the form it then had acquired. 



Weights. Deflections. Retaroed to. 



8637 75 .03 



9327 '76 03 



10017 - -80 .03 



10707 - -88 .03 



11397 ----- .95 .04 



12087 1-04 .08 



12815 1.08 .09 



13543. It broke with this within 1 J inches of 

 the middle by tension : 13543 lbs. = 6 tons. 103 lbs. 



53. For a beam to support equally through 

 its whole length a uniform load, it is necessary 

 that it should bear the same weight, when 

 applied towards its ends, that it bore in the 

 middle. To ascertain whether the above beam 

 would have done this, the longer half of it 

 was placed upon two supports 3 feet 6 inches 

 asunder ; one prop supporting the end as before, 

 and the other lying under the middle of the 

 beam. Weights were then gradually laid on, 

 half way between the supports, till fracture 

 took place. It broke with 23396 lbs. or 10 tons 

 8| cwt., 15 inches from the end, and where 



