44 BULLETIN 272, U. S. DEPARTMENT OF AGRICULTURE. 
e 
TABLE 12.—Diameter of virgin cypress in Louisiana, based on age.} 
Diameter | Diameter 
Diameter outside Diameter | outside 
Age. eps bark 20 feet Age 7 | bark 20 feet 
breast high. wail breast high. aud 
ground. ground. 
Years. Inches. Inches. Years. Inches. Inches. 
10 Ont | he aie as 110 12.8 aS 
20 Pa ie |e va oer 120 1357. 8.0 
30 BT = 0.6 130 14.6 8.7 
40 5.0 116%) 140 15.5 9.4 
50 6.2 2.4 150 16.3 10.0 
60 Use 5 2 160 ibycal 10.6 
70 8.6 4.1 170 17.8 11.2 
80 9.7 4.9 180 18.6 11.8 
90 10.8 5 UF 190 19.3 12.3 
100 11.8 6.5 200 20.0 12.8 
| 
1 Based on decade measurements on 68 stumps, 92 to 791 years old (average, 263 years). 
There is good evidence based upon the measurement of a large 
number of trees that diameter growth of cypress under similar local 
situations over its northern range, for example Missouri and Mary- 
land, is practically the same as throughout the Southern States. In 
strongly acid and shallow soil, where growth is exceedingly slow, 
trees from 8 to 10 inches at breastheight may be from 180 to 240 years 
olden 
GROWTH IN VOLUME. 
The combined growth in height and diameter determines the growth 
of a tree in volume. Commercially it is very desirable that the 
volume increment be made by trees as cylindrical in form and free 
of branches as possible. 
Large cypress trees, measuring from 5 to 8 feet in diameter, often 
contain from 5,000 to 10,000 board feet of merchantable lumber. <A 
4-log tree in the Okefinokee Swamp scaled 6,875 board feet,’ a 5-log 
tree scaled 12,025 feet, and 3 logs from one tree cut 9,900 feet mill 
scale. A 5-log tree on the St. Johns River in Florida cut out 9,600 
feet. There is record on the Santee River, South Carolina, of one 
22-foot log scaling 4,000 board feet. In stands running from 12 to 
16 inches in diameter, as many as 10 to 15 logs are required for a 
thousand board feet. The log run probably averages now mostly 
between 3 and 5 logs per thousand,? although the size of the cypress 
logged in the same region varies greatly. In 12 consecutive days 
in 1913 one large company in southern Louisiana, which is clean- 
cutting a typical deep cypress swamp, hauled out 2,742,000 feet, 
averaging a little less than 5 logs per thousand feet, or about 208 
feet per log. 
Tables 16 and 17, given in discussing the value of the timber crop, 
show the relation between increase in diameter and volume. Volume 
1 Doyle scale. 
2 Tn 1897 in a typical logging operation, Roth found an average of 10,000 logs to run about 300 feet, or 34 
logs to the thousand board feet. 
