1314 



Canadian Forestrij Journal, September, 191'. 



Rock Splitting Power of a Tree 



The great expansive power of tree- 

 growth is shown in The Guide to 

 Nature, by H. E. Zimmerman. 

 Writes Mr. Zimmerman: 



"Accurate experiments have been 

 made by scientific investigators to 

 show the remarkable power of grow- 

 ing plants. It has been found that 

 comparatively delicate plants have, 

 in their growth, lifted weights total- 

 ing hundreds of pounds. Some years 

 ago a picture was published in Strand 

 magazine, showing how a plant had 

 pushed itself up through a hard pave- 

 ment constructed of asphalt, gravel, 

 etc. The growing power of a tree, 

 especially after it has attained con- 

 siderable size, is correspondingly 

 greater. Contrary to what many 

 people think, most rocks have seams 

 or cracks of varying defmiteness, or 

 they eventually develop them through 

 the action of rain, frost, and sunshine. 

 Into these cracks, however minute, 

 the rootlets of small plants penetrate, 

 carrying with them a Httle humus, to 

 decay and to be followed by other 

 roots. Moisture follows, which freez- 

 es and cracks off small rock-particles, 

 when larger roots find their way in, 

 carrying more dirt. The crack, wid- 

 ening and deepening through the 

 course of many years, becomes filled 

 with drifting dirt, when perhaps a 

 seed of some tree blows into it, and 

 then the real process of rock-splitting 

 begins on a larger and more rapid 

 scale. If the rock has a well-de- 

 veloped seam the expansive force of 

 the roots of a tree is likely to split it 

 entirely asunder. 



SWEDISH STORES OF PULP 



No less than 200,000 tons of wood 

 pulp are said to be stored at Swedish 

 ports awaiting sale or shipment. 

 Much of the pulp held in storage 

 has been bought and paid for by 

 British dealers, but cannot be de- 

 livered owing to the Swedish em- 

 bargo on shipments of wood pulp to 

 that countrv. American buvers have 



abandoned their efforts to purchase 

 wood pulp in Sweden. The Swedish 

 Government now requires a guarantee 

 that Swedish pulp exported shall be 

 used in the country to which it is 

 first shipped. 



A NOTE FROM A GUIDE 

 Burnt Church, N.B., June 22. 

 Canadian Forestry Assoc, 



Ottawa. 

 Dear Sirs: — 



I received your card on the 10th 

 instant asking to watch my camp 

 fire etc. as never before, or my parties 

 not to throw away any lighted cigar- 

 ettes, so I will now watch and pro- 

 tect the forest even not my own 

 parties but others that go about the 

 woods. 



Alex. Mitchell, Guide. 



ASSET IN CA^P DISHWATER 

 Lieut. Gordon B. Black, formerly 

 of the "Western Lumberman'" staff, 

 Vancouver, was recently promoted 

 from the Canadian headquarters staff 

 at Shorncliffe to the position of 

 assistant to the Director of Timber 

 Operations in Great Britain and 

 Scotland, with the rank of Captain, 

 which was conferred in recognition of 

 the high efficiency introduced by him 

 in the task of supplying the needs of 

 the various Canadian hospitals in 

 England. Capt. Black writes that 

 the conservation of food in the for- 

 esters' camps in England and Scot- 

 and is a live issue, as instanced by 

 the fact that a new arrival was sent 

 to the guard house for twenty days 

 for throwing away a "hunk" of bread 

 instead of placing it in the receptacle 

 provided for food remnants. As a 

 further instance of the saving methods 

 in vogue, Capt. Black notes that the 

 dishwater in all forester dining camps 

 is skimmed twice. The grease thus 

 saved is sold to the Imperial Muni- 

 tions Board each week, the monthly 

 revenue amounting to a handsome 

 total. 



