OLEORESIX PRODUCTION 
17 
Table 4. — Comparison of ring width, summer wood, and resin passage formation 
for 1915, 1916, and 1917. 
Operation. 
Number of 
trees 
examined 
. for— 
» * t ~q t™™~A Average resin centers per one-eighth inch cross 
Amount of wood formed. | 6 section (Nov. 17, 1917). i 
1916 compared 1917 compared 
to 1915. 
1917 
Total 
ring. 2 
Sum- 
mer 
wood. 2 
to 1915. 
Total 
ring. 2 
Sum- 
mer 
wood. 2 
1915 
No. 
Size. 
No. 
Size. 
No. 
Size. 
102 
Standard chip- 
ping. 
Double chip- \ 1nc 
pmg 
Narrow chip 
ping. 
101 
Per ct. Per ct. 
1-34.0-51.5 
1+66.0+48.5 
f-43. 0-63.0 
\+57. 0+37.0 
f— 35. 5 —41. 5 
\+64.5i+5S.5 
Perct 
-56 
+ 44 
-58 
+42 
-45 
+55 
Perct 
-671 j 
+33/1 
-56\ 
+44/ 
-45V 
+55/ 
Medium 
..do 
Smallest 
4.4 
3.8 
4.7 
Largest. 
...do.... 
...do..... 
8.3 
6.4 
Smallest. 
Do. 
Medium. 
1 In 1916 material it was noted that the narrow had more resin centers than the standard or double. 
1 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. 
Calculate 
per cr< 
Total cups), 
turpen- 
tine. 
Rosin. 
d yield 
)p (10,000 
Turpen- 
tine. 
Standard 
Narrow 
Double 
/ 1916 
\ 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 
Gallons. Pounds. 
2, 002. 5 119, 929 
1,625.0 102,334 
1,853.0 98,073 
1, 761. 98, 176 
1,301.0 142,932 
1, 091. 121, 424 
Gallons. 
3,704 
3, 046 
3,035 
2,946 
4,248 
3,613 
Plot. 
Year. 
Comparison of yields on the percentage basis. 
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. 2 
Rosin. 
Turpentine. 
Rosin. 
Turpentine. 
Standard { }jj}5 
Narrow { }^16 
Double { gg 
Pounds. Pounds. 
100 
100 
81.7 
95.9 
119.1 
118.6 
-18.3 
- 4. 1 
+19.1 
+ 18.6 
Gallons. 
100 
100 
81.9 
96.7 
114.6 
118. 7 
Gallons. 
-IS. 1 
-3.3 
+14.6 
+ 18.7 
Pounds. 
100 
85.4 
100 
100.1 
100 
85.0 
Pounds. 
-14.6 
+".T 
-is.' 6' 
Gallons. 
100 
82.2 
100 
97.1 
100 
85.2 
Gallons. 
•17.8 
■'2.*9 
14 " 8 
1 Compiled from monthly field reports for 1916 and 1917. 
» Minus ( — ) indicates loss; plus ( + ) indicates gain. 
