578 PROCEEDINGS OF SECTION H. 



It will be observed that there is no relation between the per- 

 centage of ash and charcoal produced, but the tendency, in regard 

 to the calorific value is, that the timber giving the lowest percent- 

 age of ash also gives the highest calorific val le, and, conversely, 

 the timber giving the greater percentage of ash, is lower in calorific 

 value. 



Summary. 



1. The calorific value of dry charcoal produced from the eucalypts 



averages, 7800 C. 



2. The calorific value of dry wood produced from the eucalypts 



averages 4650 C. 



3. That moisture decreases the calorific value about equal to the 



percentage of moisture it contains. 



4. The calorific value does not depend upon the density of the 



wood, but rather on the amount of ash it contains. 



5. It would appear that the lighter woods give the purest charcoal. 



3. THE DISTRIBUTION OF STRESS IN THE STEEL RODS 

 OF A REINFORCED CONCRETE BEAM. 



By Prof. Chapman and H. G. Jenkinson, B.A. 



4. BEET-SUGAR ENGINEERING. 

 By G. S. Dyer. 



5. ELECTRIC COOKING. 



By W. H. Alabaster. {Printed in ^'Mining and Engineering 

 Review," Feb. 291S). 



6. EXPERIMENTS ON THE ELASTIC DEFORMATIONS 

 OF AUTOGENOUS WELDS, AND WELDED DRUMS. 



By Prof. S. H. Barraclough and H. A. Rorke, B.A. 



