OLEOEESIjST PRODUCTION. 



17 



Table 4. — Comparison of ring width, summer wood, and resin passage formation 



for 1915, 1916, and 1917. 





Number of 

 trees 



Amount of wood formed. 



Average resin centers per one-eighth inch cross 

 section (Nov. 17, 1917).i 



Operation. 



examined 

 for — 



1916 compared 

 to 1915. 



1917 compared 

 to 1915. 



1915 



1916 



1917 





1916 



1917 



Total 

 ring. 2 



Sum- 

 mer 

 wood. 2 



Total 

 ring. 2 



Sum- 

 mer 

 wood. 2 



No. 



Size. 



No. 



Size. 



No. 



Size. 



Standard chip- 

 ping. 

 Double chip- 



Narrow chip- 

 ping. 



\ 102 

 J- 10S 

 | 101 



52 

 55 

 51 



Per ct. 

 1-34.0 

 1+66. 

 /-43.0 

 \+57. 

 J-35. 5 

 \+64.5 



Per ct. 

 -51.5 



+48.5 

 -63.0 

 +37.0 

 -41.5 

 + 58.5 



Per ct. 

 -56 

 +44 

 -58 

 +42 

 -45 

 +55 



Per ct. 

 -671 

 +33/ 

 -56\ 

 +44/ 

 -451 

 +55/ 



1.5 

 1.2 



.8 



Medium 

 ...do 



Smallest 



4.4 

 3.8 



4.7 



Largest. 



...do 



...do 



8.3 

 6.4 

 9.3 



Smallest. 



Do. 

 Medium. 



1 In 1916 material it was noted that the narrow had more resin centers than the standard or double. 

 ' Minus sign (— ) indicates decrease in width; plus sign (+) indicates same width or increase in width. 



Table 5. — Comparison, of yield data for 1916 and 1917. 1 



Plot. 



Year. 



Corrected 

 number 

 of faces 

 or cups. 



Total 

 dip dis- 

 tilled. 



Total 

 rosin. 



Total 

 turpen- 

 tine. 



Calculated yield 

 per crop (10,000 

 cups). 





Rosin. 



Turpen- 

 tine. 





f 1916 

 1 1917 

 / 1916 

 1 1917 

 / 1916 

 \ 1917 



5,405 

 5, 335 

 6, 105 

 5,977 

 3,062 

 3,020 



Pounds. 

 63, 926 

 70, 275 

 61, 062 

 77, 776 

 42, 687 

 50, 805 



Pounds. 

 64, 822 

 54, 595 

 59, 874 

 58, 680 

 43, 766 

 36, 670 



Oallons. 

 2, 002. 5 

 1, 625. 

 1, 853. 

 1, 761. 

 1, 301. 

 1, 091. 



Pounds. 

 119, 929 

 102, 334 

 98, 073 

 98, 176 

 142, 932 

 121, 424 



Gallons. 

 3,704 





3,046 

 3,035 



Double 



2,946 



4,248 





3,613 





Year. 



Comparison of yields on the percentage basis. 



Plot. 



Standard for respective years 

 rated as 100 per cent for the 

 given year. 2 



1916 yield for each crop rated 100 

 per cent for that crop. 3 





Rosin. 



Turpentine. 



Rosin. 



Turpentine. 





/ me 



\ 1917 

 / 1916 



1 'nil lid::. 



LOO 

 LOO 

 81.7 



95. 9 



119. 1 



L18.6 



I'ovuii::. 



-IK. 3 

 - 1. ! 



1 I'.l. ! 



I 18.6 



Gallons. 



ion 

 100 

 81.9 

 96.7 



lli.d 

 lis. 7 



Gallons. 



— IS. 1 



- 3.3 

 1 14. 6 



t is. 7 



I'lUllllU. 



11)0 



85. 1 



ion 

 mo. i 

 mo 

 85. o 



Pounds. 

 —14.6 



+ -i 



- 15. 



(,'ullims. 

 100 

 82.2 



inn 



97.1 

 100 



85. 2 



Gallons. 

 -17.8 



Double 



1 1917 

 / L916 

 1 1917 



— 2.9 



1 I.S 



1 Compiled from moiillil v field riporl ; for 1916 and 1917. 



»Mlnus( -) indicates lot ; plus (+) Indicates gain. 



