48 The New York State Collegeof Forestry. 
A study was made of the volume of mature yellow birch on 
the logging operations of the Emporium Forestry Company in 
southeastern St. Lawrence county. Trees were measured as 
cut in the regular logging operations of the Emporium Forestry 
Company, nae scaled in the log lengths found by Scribner Rule. 
Utilization in the tops approximated eight inches and long logs 
up to twenty feet were cut. The close utilization in length of 
the logs tended to decrease the volume for individual diameter 
classes. 
This table is submitted as showing the volume ruled of an 
actual logging operation under present conditions of utilization. 
Growth, height, diameter and volume were computed by cor- 
plete stem ioe of the trees. 
TABLE XVIII 
VOLUME TABLE FoR YELLOW BircH BASED ON MERCHANTABLE CONTENTS IN 
Boarp EET, SCRIBNER RULE, ON MEASUREMENTS ON 351 TREES, TOWN 
OF COLTON, COUNTY OF ST. LAWRENCE, N. Y.- 
VOLUME IN BOARD FEET—SCRIBNER RULE 
D.BH NUMBER OF SIXTEEN FOOT LOGS 
outside seahe u 
bark | } 
1Tlog | 1% logs] 2logs | 2% logs| Slogs | 3% logs afieeds 
OFS estevartee 32 43 55 2 
Jia NS ae 36 48 60 72 5 
TR Gets 41 53 66 80 27 
Aisa 47 60 75 95 Aree 24 
ae ee 54 67 86. 106 38 
Medes, ash et ale 51 T7 97 122 145 168 23 
Gio ch esate 68 84 107 140 166 198 133 
Life cree ts 76 96 123 158 193 229 31 
18 84 108 139 175 217 262 18 
ORs ct 93 1PAl 157 200 246 300 27 
ON eas eis 102 3 ine 224 281 345 23 
721 ee eee ulin We 150 198 254 317 392 aL 
22 123 169 222 285 357 445 18 
ew pavers aie 13 186 245 317 400 496 9 
A re ecatehtont 148 206 271 350 441 550 18 
P45 eR eRe ae 162 223 296 385 495 621 10 
rae a ire 1 abcde 243 324 418 538 678 4 
tele: Sec ¥)i% 193 264 351 452 590 750 9 
eis. eos 210 286 382 500 645 830 5 
Oe ieee the 229 310 420 549 710 920 5 
a as ete % ers 250 336 452 598 15 1050 8 
Total.. 351 
