142 Proceedings of the Royal Society of Victoria. 



Load at eacli end of bi-am Ultimate 



at moment of failure. deflection. 



4. Old form, Fig. 2 of dia- ) ^^^^^^ .^ .^^^ 



gram. Weight 12* oz. J 



In experiment 4 the beam was placed between boards connected 

 by bolts, in order to check a tendency to bend sideways that had 

 been noticed in experiment 3. This precaution led to a consider- 

 able increase of strength, as is shown by comparing the results of 

 experiments of 3 and 4. 



As the above beams were not all of exactly the same weight 

 the i-eadiest way of determining their relative merits is by 

 finding how many times its own weight each beam carried. 

 These results, obtained by dividing the load cai'i'ied by the weight 

 of the beam, are: 1131, 1203, 529 and 634 respectively, showing 

 the enormous superiority of the proposed type. 



