[Уог. 4 
154 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
averages of the above data will be calculated and reported 
with the data taken from cultures incubated for a two-year 
period. 
The sincere thanks of the writer are extended to the follow- 
ing, who have aided in various ways in this work: Dr. Her- 
mann von Schrenk for suggesting the problem and for helpful 
suggestions in the work and in the preparation of the paper; 
the Southern Pine Association for financial aid; The Missouri 
Botanical Garden for the use of laboratories and library; Pro- 
fessor B. M. Duggar for helpful suggestions and criticisms 
throughout the work; and Mrs. Е. Bardell Zeller for help in 
making the calculations and in preparing the tables. 
Graduate Laboratory, Missouri Botanical Garden. 
BIBLIOGRAPHY 
Bayliss, Jessie S. (708). The biology of Polystictus versicolor (Fries). Jour. 
Econ. Biol. 3; 1-24. pl. 1-2. 
Betts, Н. 8. (15). Grading rules of yellow pine structural timber 7. 
Mes special reference to density). Аш. Lumberman 2084: 28—30. f. 1 
1915 
Buller, A, Н. В. (06). The biology of Polyporus squamosus Huds., a timber- 
destroying fungus. Jour. Econ. Biol. 1: 101-138. pl. 5-9. 1906. 
Dudley, P. Н. (87). Structure of certain timber ties; behavior and cause of 
their decay in the roadbed. U. S. Dept. Agr., For. Div. Bul. 1: 31-65. 1887. 
Falck, В. (709). Die Lenzites-füiule des Coniferholzes. Méller’s Hausschwamm- 
orschungen. Heft 3: 1-234. pl. 1-7. f. 1-24. Jena, 1909 
Hartig, В. (78). Die Zersetzungscheinungen des Holzes der Nadelholzbüume 
und der Eiche. pp. 1-151. pl. 1-21. Berlin, 1878. 
-------, (702). Der echte ена und andere das Bauholz zerstórende 
Pilze. pp. 1-105. f. 1-33. Berlin, 
Harz, C. РА (68). Beiträge zur Kenntniss ы: трон officinalis Fries. бос. 
Im mp. d. Nat. de Moscou, Bul. 41: 3-40. 
Hoxie, F. J. (714). ыи for factory timbers. Am. бос. Mech. Eng., 
Jour, 36: 20-31. f. 1-11. 1914. 
------, (15). Dry rot in factory timbers. pp. 1-107. f. 1-70. Boston, 1915. 
------, (16). Resin in yellow pine for decay resistance. Engineering News 
75: 765-766. f. 1-2. 1916. 
ee С. J. (716). Laboratory tests on the ci d Ж е woods. 
I. Flask tests on conifers. Mycologia 8: 80—92. pl. 1. 
— J. B. (93). Timber pa Investigations on longleaf pine. 4. Results 
mechanical tests. U. S. Dept. Agr., For. Div. Bul. 8: 22-31. f. 11-16. 
1893. 
