274 



ABSTRACT OF EXPERIMENTS 



The four first experiments were tried by J. G-oldingham, Esq., 

 and myself. Having no other convenient weights, and the 

 Public Treasury being close to the spot where we were trying 

 them, we made use of bags containing each Es. 500, and weigh- 

 ing with their contents each 12 lbs. 4 oz. The pieces of wood 

 were laid on the supports not fixed. The deflections were mea- 

 sured in the middle after each bag was added, but it would not 

 serve any useful purpose to show them all in detail. The re- 

 maining experiments were tried at Singapore by Lieut. C. M. 

 Elliot, of the Engineers, and myself, and with great care. We 

 used as weights on this occasion bricks, of which 9 weighed 

 25 lbs. The 11th and 12th experiments were tried in order to 



b d 2 

 test the formula W = — — • 

 i 



The general results of these experiments are shown in the sub- 

 joined table, in which, for the sake of comparison, are entered 

 (Nos. 14, 15, 16, 17) experiments by Professor Barlow, and 

 (Nos. 18 and 19) by Lieut. Brown, U.S. Engineers, quoted in 

 Mahon's "Elementary Course of Civil Engineering," pp. 47 and 48. 



