60 BULLETIN 1136, U. S. DEPARTMENT OF AGRICULTURE 
TArLE 20.—Special kiln-drying Schedule 115 for 56-inch artillery-wheel rims, bent 
oak, 344 by 3% by 56 inches 
Dry- Wet- 
bulb bulb Relative 
Moisture content at which changes should be made, per cent temper- | temper- | humidity 
ature ature 
oH Cah: Per cent 
TOT TIN OT ra SORA a ee Reel co Ses ee es NO Ae ee EO ERO ER 90 | 83 
ye MP al a) Be Ais eee er 3A EE Cae EEE Nae Bega enti he a NEI ey spe Se 95 88 75 
(i [soe en cae Re me AT © AYE Speier Fel UAE PURE ENN 2 Soe Meee Dee edt Le) Ee URI ES ella ee 100 93 75 
17a eit ER OBA ID) PON Ey Se ME LEA ORNL cs Betis cig SS alee Fob tee 105 97 75 
COREE co SLL Sek ly pace ES TRE Ck SY A A i 110 102 75 
SHESCEEM. SUR OTE ANS NEE RC ETE? . Ae ee eee Oe a eee anes 115 105 70 
} ee Bsa rh Pe utes Coles aN ah le GORE ae oe Cari Wate a ree Si J i ek © 120 105 60 
QOS Ee OE A BS ON Je te DIN Ng RE AE ea RRS ase ROM eae 130 106 45 
Mi Sores See seh th. hla dee Bee Fee (RE ay oe a pla ea i, Ua oak ae 140 108 35 
11 SS 1 ee ae a i EL atone a aie eA dae Mn SC Sag ole LI pink ae le ME 150 107 25 
TABLE 21.—Special kiln-drying Schedule 116 for 60-inch artillery-wheel rims, bent 
oak, 334 by 334 by 60 inches 
Dry- Wet- 
bulb bulb Relative 
Moisture content at which changes should be made, per cent temper- | temper- | humidity 
ature ature 
SOR. aid (he Per cent 
(OTOTAIM ONG he = ee ee eee = ae ye Ee OE Rare ey AE lei nig De 85 79 75 
Ge tp ER AE AN wee Sos SE IR Ee i DAY BARRA Re eS, 5 eee ee 90 83 75 
(a0 ee 5 2s a ee et Aes Serer ees inn diy oer ee en Mera See T eS Ware 7. 2 UR, 95 88 a 
Lay enh Dyes te) ORY coy ON eS eR ce A ADS GORE 5 Rete Pooh eaten OP gn) DGS SPU Dane yep in ete 100 93 75 
OOM Ree EEN ae ee Per STN eee ee ec ee es eee 105 97 75 
Pap SN AE a BARS 2 Se UR ROaDY Duara Sein ENS Se I ER FA Te atid ALES EE Ch ae ah eae 110 100 7 
iS (Beek Shae Seca SE Pe Phas Shes rah, AIS he debe Nn Seok Se tO te A a 115 100 60 
2A) PP RONNIE wok a MNS cer DLA Rte Meee RUNS SEO ek Nae EAS BFS eNO On 125 102 45 
AYE eA: Bites By ca ae £ NAS ae oS Ns BING TY ee OE be Bet enteral 135 104 35 
AN (sok ee AN day ES a ge SA LCs Re Pe 2 ae eA pc td RD ce 145 104 25 
SAP GUM 
When the amount of red gum (heartwood) or of quarter-sawed 
sap gum in any kiln charge of gum is so small that it need not be 
considered, the special schedule of Table 22 is recommended. Green 
stock for which this schedule is used should be steamed for four 
hours at 180° F. and at saturation before drying is started. : 
The steaming of sap gum before air drying is discussed on 
page 66. 
TABLE 22.—Special kiln-drying Schedule 117 for plain-sawed sap gum up to six 
quarter inches in thickness 
Dry- Wet- 
bulb bulb Relative 
temper- | temper- | humidity 
ature ature 
Moisture content at which changes should be made, per cent 
OR: ORs Per cent 
AS .OF MOT 25 sete ees ee) 8 Pies a8 3 oo Seca ee Ld Ee Re ee 165 148 65 
AES CRT Oe Ns 2 ag Le AL en Cee Me AOD ed eee 2 See gee ee 165 148 65 
EM as aa es Car va alge rg iy viet YA Epi eas Dee Re MER Dee AG Sea cabea ty, 170 150 60 
Tre RE oA D, Ee  Th SSIL U  Liiert Salt alec in, S00? ues Ona as ele, Coe a 175 154 60 
yi PPLE OND, P alul Werner ee eh yes et OER AR EA ae Se ls wtih ee aD Ea oe a 175 151 55 
176 135 35 
i6 Los U8 ay: | Leek Mee ee cue Sp ee ea EDN Dh 28 he Oo peeeetinene ne Med tv babe et CL te pk 175 125 25 
