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XI 



CM. \ITKR IX 



FOREST UTILIZATION 



For construction timbers, 207 fence posts and rails, 

 208 railroad ties, 209 implement part*, 210 fire- 

 wood, 211 logging, 213 felling, 213 dividing the 

 logs, 215 skidding, 216 hauling, 218 the chief 

 uses of our common woods, 219 



CHAPTER X 

 BY-PRODUCTS OF THE NORTHERN WOODLOT 



Maple sirup and sugar, 225 the sugar maple, 226 

 season, 227 equipment, 228 tapping the tre 

 collecting sap, 230 boiling the sap, 230 making 

 sirup, 230 sugaring-off, 232 yield per tree, 233 

 effect on tree, 233 wintergreen oil from black birch, 

 235 tanning materials, 235 specifications of extract 

 wood, 237 



CHAPTER XI 

 Tin. DISABILITY AND PRESERVATION OF WOODS 



Factors influencing durability, 239 naturally dura- 

 ble woods, 241 substitutes, 242 cause of rot, _'.; 

 method of seasoning logs and timber, 245 seasoning 

 lumber, 245 coating of timbers, 246 coal tar, 217 

 oil paint, 247 Him- whitewash, 217 charring, 248 

 general rules on preserving timbers, 248 preserving 

 materials, 250 brush method, 2Ao dippim:. I 

 open-tank treatmeir 



CHAITKK XII 

 ARBORKI i 1 1 i i \ M> ORNAMKN r M PuumVG 



Selection of ornaincnt.il tn - transplanting 



large trees, 268 pruning, 266 to improve shape of 

 : how to prune, 269 table of ornamental 

 . 270 



236-S87 



MQ-I76 



