34 BULLETIN" 1136, U. S. DEPARTMENT OF AGRICULTURE. 
Table 2. — Hardiaood schedules 1 to 8. 
[D= dry-bulb temperature in degrees F.; W= wet-bulb temperature in degrees P.; H=per cent relative 
humidity.] 
Moisture per cent. 
Schedule 1. 
Schedule 
Schedule 3. 
Schedule 
4. 
D. 
W. 
H. 
D. 
W. 
H. 
D. W. 
H. 
D. 
Vv\ 
H. 
140 
145 
150 
155 
160 
165 
170 
132 
135 
137 
136 
135 
127 
116 
80 
75 
70 
60 
50 
35 
20 
135 
140 
145 
150 
155 
160 
165 
128 
130 
133 
132 
131 
124 
112 
80 
75 
70 
60 
50 
35 
20 
130 123 
80 
75 
70 
60 
50 
40 
25 
125 
130 
135 
140 
145 
150 
118 
121 
123 
123 
122 
120 
80 
40 
135 
140 
145 
150 
155 
160 
126 
128 
128 
127 
124 
115 
75 
30 
70 
25 
60 
20 
50 
15 
40 
10 to final 
155 
111 
25 
Moisture per cent. 
Schedule 5. 
Schedule 6. 
Schedule 
7. 
Schedule 8. 
D. 
w. 
H. 
B. 
W. 
K. 
D. 
W. ! 
H. 
D. 
W. 
H. 
120 
125 
130 
135 
140 
145 
150 
113 
116 
119 
121 
120 
119 
112 
80 
75 
70 
65 
55 
45 
30 
115 
120 
125 
130 
135 
140 
145 
109 
111 
114 
116 
116 
115 
108 
80 
75 
70 
65 
55 
45 
30 
110 
115 
120 
125 
130 
135 
140 
105 | 
109 ! 
111 1 
112 j 
112 
111 
108 
85 
80 
75 
65 
55 
45 
35 
105 
110 
115 
120 
125 
130 
135 
101 
104 
85 
40 
80 
30 
107 
25 
109 
110 
109 
107 
70 
20 
60 
15 
50 
40 
Table 3. — Index of drying schedules to use with various hardwood species (up 
to 6/4 inch thick.) 
Species. 
Hard- 
wood 
sched- 
ule. 
Remarks. 
Species. 
Hard- 
wood 
sched- 
ule. 
Remarks. 
Ash 
2 
1 
3 
1 
5 
2 
5 
2 
3 
2 
2 
2 
3 
2 
5 
Relieve stresses often. 
Squares or quartered 
stock only. 
Relieve stresses frequent- 
ly. 
Including "sap gum." 
Holly, American.. 
Hornbeam (iron- 
wood). 
4 
4 
5 
4 
4 
3 
6 
7 
7 
8 
5 
5 
1 
5 
5 
2 
Basswood 
Beech... 
Birch 
Boxwood 
Mas^iolia 
Butternut 
Cherry, black. . . 
Chestnut 
Mahogany. 
Maple (hard and 
soft). 
Oak, red and white 
Do 
Northern highland stock. 
Northern lowland stock. 
Cotton gum (tu- 
pelo. 
Cotton wood 
Elm 
Do 
Do.... 
Osage orange 
Persimmon 
Poplar, yellow 
Gum, red 
Hackberry 
Walnut, black. . . . 
Willow 
SOFTWOOD SCHEDULES. 
Because of large variations in the initial or " green " moisture 
content existing among the various softwoods, it has been found 
expedient to divide softwood schedules into several divisions, as 
shown in Table 4. The divisions of each schedule differ from one 
