Or 
FRAMED STRUCTURES UNDER STRESS. 65 
In a similar way the deformations and deflections of 
various forms of roof and bridge frames may be worked out 
in a very few minutes by any one that has had a little 
practice in the system. 
This system has been given in lectures and examinations 
for some time past at the Melbourne University, and the 
students appear to find no difficulty in following and apply- 
ing it even in cases considerably more complex than those 
given above. 
