AS APPLIED TO WORKS OF CONSTRUCTION. 273 
experiment was only continued up to a load of 1,000 Ib. on each 
strut. The loads and deflections are given in following table :— 
Central Central 
v. | poentl, w. pent 
Tb. Tb. 
100 0:00 1,500 0-16 
500 0°05 2,000 0°20 
1,000 0-11 
The load was then applied at points situated 10 in. apart, each 
5 in. on either side of the centre, the beam broke in the same 
place as before, immediately over points @ a, with a total load of 
4,800 Ibs., or 2,400 Ibs. at each of the two points of application. 
The loads and deflections are given in the following table :— 
. Central 
hed Donel: | W. Deflection. 
Tb. inches. Tb. inches. 
100 0°05 2,000 0:26 
200 0:06 2,400 0:28 
400 0:08 2,800 0°30 
600 O11 3,200 0°32 
800 0:15 3,600 0°34 
1,000 0°20 4,000 0°38 
1,200 0°22 4,400 0°41 
1,400 0:23 4,800 
1,600 0°24 
1 ,800 0:25 | 
In the course of the experiment it was observed that as the 
deflection of the beam increased the piers moved horizontally an 
A ing pieces at 6 b had to be removed and replaced by others 
transomes are 
the longitudinal and transverse resistances of the wedges or 
mes according to the timber used. 
_ In conclusion, the author desires to thank Mr. C. Goodchap, the 
Commissioner for Railways, and Mr. Cowdery, Engineer-in-Chief 
