TABLES RELATING TO PARTS III AND IV 265 



Table No. 6 gives volume of tree from ground to tip 

 exclusive of branches. Includes bark, which is about 12^ 

 per cent of the total volume. Based on 2500 trees cut in 

 Maine, New Hampshire, and New York, calipered each 4 

 feet, computed separately, and averaged. Original. 



This table may without great modification be applied to 

 other soft wood species, regard being had to the remarks on 

 tree form on pages 167 173 of this volume. Balsam fir, 

 however, is believed to be pretty uniformly somewhat 

 slimmer than spruce, having, as would appear from the 

 results of a study on fir made by Mr. Zon of the United 

 States Forest Service, 8 per cent less volume for the same 

 breast diameter and height. 



VOLUME TABLE No. 7. SPRUCE IN FEET, BOARD 

 MEASURE 



Based on 2500 trees scaled in 16-foot log lengths up to 

 6 inches in diameter by the Maine rule and discounted 

 from 5 to 10 per cent. Purports to give the yield in edged 

 lumber of average spruce trees in economical woods and 

 mill practice, 



