20 BULLETIN 1262, U. S. DEPARTMENT OF AGRICULTURE. 
Of the various fungi tested the blue-stain fungi appear to be the 
most resistant to heat. No great differences in resistance were noted 
among the various rot-producing fungi tested. 
. Commercial kiln conditions nd steaming processes coming within 
the effective limits of temperature and time as determined by the tests 
are effective in sterilizing infected wood up to and including pieces 
4 by 4 inches square. Pieces 6 by 6 and 8 by 8 inches square were 
sterilized when subjected to 130° F. for a period of nine hours. 
Sterilization was also effected by steam-pressure treatments. 
Methods of piling and storage are important factors in protecting 
wood against. deterioration due to fungi. ) 
Certain fungi continue to develop in wood as long as favorable 
conditions are present, and they will revive and continue development 
after long periods of drying. 
From the data obtained it is assumed that wood that is properly 
kiln dried will be sterilized and that with proper storage it will 
remain bright and sound. 
LITERATURE CITED. 
(1) Brewster, D. R. : 
1919. Schedules for drying hardwoods. Jn Hardwood Rece., vy. 47, 
no. 6, p. 19-21; no. 8, p. 20-22a, illus. 
(2) ‘Hoxtm, HH: J. 
1915. Dry-rot in factory timbers. Ed. 2. 107 p., 70 fig. Boston. 
(3) Hunt, GEorcE M. 
1915. Temperature changes in wood under treatment. Jn Proc. 11th 
Ann. Meeting Amer. Wood Preservers’ Assoc., p. 85-99, 7 fig. 
(4) LoucHBorouGcH, W. K. 
1922. Schedules for drying softwoods. Jn Southern Lumberman, 
v. 105, no. 1385, p. 51. 
(5) Muncy, ERNST. 
1907-8. Die Blaufaule des Nadelholzes. Jn Naturw. Ztschr. Land. u. 
Forstw., Jahrg. 5, p. 531-5738; 6, p. 32-47, 297-823, 33 fig. 
Bibliographical footnotes. 
(6) Siacers, Pau V. 
1922. Torula ligniperda (Willk.) Sace. A hyphomycete occurring in 
wood tissue. Jn Phytopathology, v. 12, p. 369-874, pl. 25. 
Literature cited, p. 374. 
(7) SwNett, WALTER H. 
1921. The relation of the moisture content of wood to its decay, with 
special reference to the spraying of log piles. Jn Pulp and 
Paper Mag., v. 19, p. 531-533, 2 fig. 
(8) 1922. The effect of heat upon wood-destroying fungi in mills. Im 
Proc. 18th Ann. Meeting Amer. Wood Preservers’ Assoc., p. 
25-29, 1 fig. 
(9) 1922. The effect of heat upon the mycelium of certain structural tim- 
ber destroying fungi within wood. (Abstract.) Jn Phyto- 
pathology, v. 12, p. 59. 
(10) Untrep STATES DEPARTMENT OF AGRICULTURE, FOREST SERVICE. FOREST 
Propucts LABORATORY. 
1922. Comparative strength of air-dried and kiln-dried wood. U. S. 
Dept. Agr., Forest Serv., Forest Products Lab. Tech. Note 
180, 1 p. 
(11) 1922. Drying periods of various woods. U. S. Dept. Agr., Forest 
Serv., Forest Products Lab. Tech. Note 107, 1 p. 
(12) ZetiER, SANFORD M. 
1920. Humidity in relation to moisture imbibition by wood and to spore 
germination on wood, Jn Ann. Mo. Bot. Gard., v. 7, p. 51-74, 
5 fig., pl. 1. Literature cited, p. 72-73. 
WASHINGTON : GOVERNMENT PRINTING OFFICE ¢ 1924 
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