Alexander — Maximum Bending -moments on Short Girders. 41 



The graphic sohition, with a shifting parabolic set-square, shown on fig. 2, 

 was published in their ElenuTitary Applied. Mechanics by Alexander and 

 Thomson in 1883, and again in 1902, and was referred to ia Professor Hele 

 Shaw's Beport vfi Cfraphvi Methods to the Edinburgh meeting of the British 

 Association. 



Fig. 12 shows a simple model for a trolly with two wheels, which was also 

 described in the Applied Mechanics. 



These models were made by Messrs. Dixon and HempenstaU, Dublin, 

 through the Kberality of the Board of Trinity College, Dublin. 



