350 



Canadian Forestry Journal, September, 1919 



WHAT IS CALLED FOR IN AN AEROPLANE 



(Timber Trades Journal.) 



To make aeroplane propellers "bone dry" 

 they are subjected to terrific tests, and a pro- 

 peller has to make 1,700 or more revolutions 

 a minute to make good. Even at that, v^^ood 

 which has been dried to the lowest possible 

 moisture content will "drip" sap after a test. 

 Whereas for ordinary commercial uses a piece 

 of wood showing a slight defect may be safely 

 and advantageously used, there is no "margm 

 of safety" with aeroplanes. Every bit of wood 

 that enters into its make-up must be perfect.' A 

 thousand feet of lumber may have to be taken 

 out of a forest to secure 50 feet or 100 feet 

 which will measure up to aeroplane require- 

 ments, or the whole lot may sometimes be re- 

 jected. This shows the need of more tree plant- 



ing, of proper forest conservation, and a nation- 

 al forest policy which will provide for the 

 future. Walnut is the best wood that grows for 

 propellers, as also for gunstocks, but practically 

 all of the framework of the air machine is of 

 spruce. Most of the parts of an aeroplane are 

 of built-up or laminated wood in which thin 

 layers are glued together, the lamination divid- 

 ing the stresses and making possible the use of 

 small pieces, which are more likely to be abso- 

 lutely free of defects. The terrific pressure, 

 the twistings and manoeuvres to which an aero- 

 plane is subjected, compel the use of perfect 

 wood that will "give" properly under prodigious 

 strain without breaking. 



DROP "WOODLOT" AND USE "WOODLAND" 



(Bulletin of the Forest Service, U.S. Department of Agriculture.) 



The increased interest in the subject of priv- 

 ate forestry, particularly with reference to farm 

 forestry, has brought about the general accept- 

 ance of the term "woodland" or "woods" in- 

 stead of the original one of "woodlot." 



A large proportion of the woodlands in the 

 eastern United States is in irregularly shaped 

 tracts, spreading out over ridges, ravines, slopes, 

 swamps, and poor lands, whereas "woodlot" 

 carries the idea of a small-sized, regularly 

 shaped, and, in a large section of the country, 

 fenced tract. When applied to the large or ir- 

 regularly shaped tracts, it is obvious that the 

 word inadequately describes the conditions. 

 "Woodlot" probably originated in New England 

 and seems fairly well established there. So long 

 as only conditions like those in New England 

 were considered, "woodlot" was accepted as 

 adequate, but in the last few years farm for- 

 estry has been developing rapidly throughout 

 the country. The private forestry movement 

 is of tremendous importance not only to the 

 owner of woodland, but to the whole commun- 

 ity in which he lives or in which the timber 

 occurs. It IS extremely desirable that the suc- 

 cess of the movement should not be hindered 

 by the use in forestry literature of a term which 

 does not fit the conditions. 



"Woodland" and "woods" are more satisfac- 

 tory, more expansive, and avoid the possibility 

 of creating confusion in the minds of the people 

 over most sections of the country where the 

 word "woodlot" has never been in local use. 



NEW HEAD N. B. FOREST SCHOOL 



Albert V. S. Pulling, B.Sc, in Forestry, of 

 New York State College, who has been en- 

 gaged in practical forestry work in New Hamp- 

 shire, has beeen appointed Dean of the For- 

 estry School of the University of Frederciton, 

 N.B., and comes highly endorsed for the new 

 post. 



"CRIMINAL DISSIPATION." 



(Montreal Star.) 



In the older countries the planting and care 

 of forests is zealously carried out, the splendid 

 monetary return being thoroughly understood. 

 Canada's natural lumber wealth is practically 

 the envy of the world, and the dissipation of 

 this wealth is criminal. Public funds can be set 

 aside for no better purpose than forest preser- 

 vation. 



