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"UNITED STATES DEPARTMENT OF AGRICULTURE 
Issued May 12, 1923 
Revised May, 1929 
Washington, D. C. 
KILN DRYING HANDB 
f= D 
By : 
ROLF THELEN, In Charge U. 8, Department of Mbrioultyr: 
Section of Timber Physics, Forest Products Laboratory, Forest Service 
CONTENTS 
Moisture in wood . . ... +. ++. ESIC OM OUCH! GAS cB a 6 oNGi6 6/6 
General principles of drying wood. . . ... » a ourolisy el omouier emo sotacmee ate 
Heatinithejiilar sees ctrs, cee ee mic tener SCewaic  aulelaemie Marjan slates ems 
Humidity amtheiksliaig.. 1-5. sy atest sive rere eure eh oe ieli ec. ertente nel onilet es) elie 
Air circulation in the kiln . . 2... 2 0 2 0 ee oo PLE ea Me ees eT ury Hes 
Dryingiand dryinpistresseS. «+ < «+ «os er es 0) «= sldle ss else 
DILGIngiScecUleSh = meme a dl cerab ao ol aie socio ei olrerles wos of neh eh ele seca 
Miscellaneous features of drying ..... +2222 c2es22 22220000 
Mypes Ol Kilns gee raven eich iron ie c Nemreereles Wek Succi lode Vell elirel ote iouianiaer ey erent 
Piling: lumber for kilnidrying 3050. <0s- s,s o «1 ss 0 os 6 © ele 6 ss 0 6 6 86 
Detailsiofikilnfoperation she ieicco a po cel ar oh wis ah aioe can obiemrerranven ele) letienbe ie of 6 
Air SGASONIG oN roe sea enteh as Cieeciclt ek oh o. seen bite sa wtel ay anetlatiens) 
UNITED STATES 
_ GOVERNMENT PRINTING OFFICE 
WASHINGTON : 1929 
