864 REPORT— 1903. 



The process is a very simple one, though naturally each particular kind of 

 timber requires some modification of the process suited to its nature. 



Numerous experiments have been made by independent authorities with, in 

 many cases, astonishing: results. The breaking strain of yellow pine had been 

 increased from 50 to 100 per cent., and all timber so treated was improved in 

 toughness and strength. Paving blocks of various kinds of timber had been 

 processed and then soaked for fourteen days in water, when it was found that 

 the ' Powellised ' blocks only absorbed from one-fifth to one-half the quantity taken 

 in by the natural wood. 



Other interesting figures and details were given, and specimens of ' Powellised ' 

 and natural timber exhibited showing the change effected by the process in the 

 various kinds of wood in daily use. 



Plants on the Serpentine Rocks in the North-East of Scotland. 

 By W. Wilson. 



