as 0 per cent. 
KILN DRYING HANDBOOK 59 
TABLE 17.—Special kiln-drying Schedule 112 for 1-inch eastern red cedar 
Dry- Wet- 
Moisture content of heartwood samples at which changes should be made, bulb bulb Relative 
per cent temper- | temper- | humidity 
ature ature 
a mae Per cent 
2 LOGE OLC arene oem penne eed Repay i diel ul ne ae alll MV eI Ni 140 128 70 
PAV) a,c mah Se a ES a ne Ee NIL ee 150 127 50 
WB Seance cl le ln at pe gL DU AD cp ea aS 155 124 40 
HUD Bea seb ae ek ES NRT ee LE eS CRO NSD Re MN NE Tg 160 115 25 
The cedar oil present in this wood causes a variable error in mak- 
ing moisture determinations, since it is driven out of the moisture 
sections in the drying oven along with the real moisture, thus giv- 
ing a calculated moisture content higher than the actual. This error 
is usually not more than 2 or 3 per cent, though it may be as great 
OAK WHEEL BLANKS 
Several schedules have been developed for oak artillery-wheel 
stock—club-turned spokes and bent rims. Since oak is extremely 
variable in its drying characteristics, great care must be exercised 
in using these schedules. Further, steaming of bent rims must 
be done with caution, since oversteaming will relieve the set 
caused by the bending, thus allowing the stock to straighten out. 
Ordinarily steaming for from one to two hours at 160° to 180° F. 
may be done periodically after the outer half inch has dried below 
25 per cent moisture content. 
TABLE 18.—Special kiln-drying Schedule 113 for 56-inch artillery-wheel spoke 
blanks, oak, 234 by 2% by 26 inches 
Dry- Wet- 
bulb bulb Relative 
Moisture content at which changes should be made, per cent temper- | temper- | humidity 
ature ature 
Cone aie Per cent 
BORO TEL OC marae eee tans cnn wee CB Rk eda al Ola gy CURRAN (ALOR nck HT OL a NL 105 100. 5 88 
(aa area re nr sce UOT MAL ee SO MOTRIN ES AL ATTA YI RN TD RTE ASM 106 100. 5 82 
ANB) aos caste cee aaa gs a SNS a SP sgn fd a DE Ng A SY OOK Ga dap Uae a 107 100. 5 79 
Bs moc EES hk eR ST BN A Pea a 2 MUTE Pe RN rat an ORT HALEN PE aed el 110 101.5 74 
SS et) LAST se ema Oh ME CD le Me OW ig 115 102 63 
2) ana aa ALD UIE PSN Noa AI PN CS TM CPN Mg ANT MUS eee hia 120 102 53 
Nabe we seb Eee re IRCA, ANUP aaa HEWN) Oe ARN UR TeV AND NE a ONE IDEN It 8 este UA 131.5 104 40 
IY) chap aches eo lg a Ce aaa hc Me YS ANS KenL Ae 142 106 30 
Tarte 19.—Special kiln-drying Schedule 114 for 60-inch artillery-wheel spoke 
blanks, oak, 3% by 3% by 26 inches 
Dry- Wet- 
bulb bulb Relative 
Moisture content at which changes should be made, per cent temper- | temper- | humidity 
ature ature 
) 10. SM, Per cent 
rah) CYR TOMLOY EY a ee SS a ew lng ee A a ch es A a ea ee inal 100 96 8 
5s (1) pp Sa) Ls al) AL WE) EL gm SERN NEAR Jet oAte, MN Ei Gy MIN He HY Mia 101 96 83 
Gi) ee yey Si EE Bia ep IRAE CO CU Se Rae ete Seat Ne ahaa DED Ae cD el ce eh 102 96 80 
BAD) et a els SD i RI MD pepe eA ah ny lc en ee IN LD ean OSL UO ec Lact 105 97 75 
FAB osha i pe i rege Ue A PM PN RM, een ph a peck Sev de (is UE SUING ev 110 98 65 
P20) ape RN ane Vedat ig ee BAI by ALSAGER PE Fark RAN Ne LZe A ae Be I A ST 115 99 56 
i RN SRNL ARPS La SRR OA ret whe coe EO eY re Pen eo) Neate spe Wierd Jee MIN Wal DENA ts 127 101 40 
nc RN i eto ey eve) La, a A LA A 140 103 29 
