214 



Caiiadiaii Forestry Journal, May, ip20. 



struction, hut very little develojjment 

 of the Alaska fnrests has yet taken 

 place. 



The normal annual cut of Sitka 

 spruce in British Columbia for both 

 pulp and lumber is about 90 to 100 

 million board feet : in the Pacific 

 states 290 to 300 million. If all of 

 the lumber suitable for aircraft con- 

 struction were secured from this, 

 British Columbia might supply from 

 five to ten million, the Pacific states 

 20 to 30 million, and the Alaska for- 

 ests might furnish a million feet or 

 more if the contemplated develop- 

 ment is realized. It requires such 

 special care in sawing to recover all 

 of the clear, straight-grained wood 

 that it is not to be expected that a 

 higli percentage of it will be saved, 

 unless very high prices are offered 

 for it. It^ should be possible, how- 

 ever, to obtain one or two million 

 feet of beam stock a year in British 

 Columbia, and three or four million 

 feet in the Pacific states for many 

 years. 



Engelmann Spruce 



If Engelmann spruce is found upon 

 further investigation to be satisfac- 

 tory, British Columbia has 566 billion 

 feet, with an annual cut of about 30 

 million feet, of which a small percen- 

 tage would meet the aeroplane stan- 

 dard. 



Eastern Spruce. 



In the report of the United States 

 National Advisory Committee for 

 Aeronautics, the supply of spruce in 

 the eastern states is estimate dto be 

 14.500 million feet, with an annual 

 cut of 725 million board feet. The 

 ]:)ercentage of this which can be used 

 for aircraft construction is said to 

 varv from 3.9 per cent, in ]\Iaine, to 

 8.2 per cent, in the southern Appala- 

 chian Mountains, but it is very doubt- 

 ful that this proportion could be se- 

 cured. 



There is no reliable estimate of the 

 amount of saw material in the 

 spruce of eastern Canada and the 

 prairie provinces, but the annual cut 

 of spruce lumber is about T.400 mil- 

 lion feet. If special efiforts were 

 made to secure all the aeroplane lum- 

 ber from the eastern cut. it might 



If thou art worn and hard beset 



With sorrows, that thou wouldst for- 

 get, 



If thou wouldst read a lesson that 

 will keep 



Thy heart from fainting and thy soul 

 from sleep, 



Go to the woods and the hills ! No 

 tears 



Dim the sweet look that Nature 

 wears. — Longfellow. 



su])ply from 20 to 30 million feet, but 

 under ordinary conditions, perhaps 

 ])erhaps four or five million feet could 

 be secured. 



Douglas Fir Supply. 



The total supply of Douglas fir is 

 estimated to be about 580 billion 

 board feet, of which 75 billion feet is 

 in British Columbia. The annual cut 

 in British Columbia is now about 

 750 million feet, and in the north- 

 western states a little over five bil- 

 lion feet. During the war, when ever}^ 

 efi'ort was made to secure as much 

 aeroplane lumber as possible from 

 the commercial cut of fir, not more 

 than two per cent, was found suitable 

 for beam stock in British Columbia. 

 On this basis. 15 million feet might 

 be secured annually in British 

 C'jlumbia, and 100 million feet in the 

 United States. 



Port Orford Cedar. 



The commercial stands of Port Or- 

 ford cedar are confined to a narrow 

 strip 20 to 25 miles wide along the 

 coast in Coos and Curry counties in 

 Oregon. The total stand is estimated 

 to he only 750 million feet, and the 

 total cut in 1917 was about 35 million 

 feet. About 12 per cent, of the cut 

 appears to be of aeroplane grade. 



The better grades of grand fir. sil- 

 ver fir. noble fir and white fir may be 

 used as substitute for spruce, especi- 

 ally in built-up parts, but the per- 

 centage suitable for aeroplane con- 

 struction as solid wood, is compara- 

 tivelv small. 



Western hemlock is also considered 

 as a substitute for spruce, but it is 

 heavier, low in shock resistance, and 

 the percentage of clear is small, so 



