588 TRANSACTIONS OF SECTION G. 
manufacturers’ works by scientific straining with subsequent heat treatment ; 
(e) considering the forms of iron and steel, by the addition of a small per- 
centage of some other element. Any one of these methods increases the 
ratio of elastic limit to maximum load, and the ratio of elastic resilience to 
the total work which has to be done on the specimen to destroy it. That 
is to say, the useful ‘ play’ energy for practical working stresses may be 
increased in some cases with resulting economy of material. 
9. A comparison of the results of the tests on wrought iron and steel 
shows the great superiority of steel as compared with wrought iron for 
shafting. 
10. The author, in conclusion, drafted a specification for torsion tests 
based on the results of the experiments given. 
3. A New Lifeboat. By James Mircuetu. 
4. An Outline of an Investigation now being conducted for the 
Dominion Government of the Coals of Canada.' By Professor 
. J. B. Porter, D.Sc. 
0. Lhe Development of the Grain Industry in the West 
and Grain Storage. By Joun MILER. 
' Published in Hngineering. 
