1917] 
ZELLER—DURABILITY OF YELLOW PINE 107 
described above and inoculated with Lenzites saepiaria. Ap- 
proximately 2500 culture blocks were prepared for this series, 
but the results given in table 1 are taken on 743 blocks of 
P. palustris, 594 blocks of P. echinata, and 321 blocks of 
P. Taeda, or a total of 1658. These were incubated for one 
year. Some of the remainder of the series were left in cul- 
ture for a two-year period, while others were used in work to 
show the relation of the oxygen and water content of the sub- 
strate to the growth of Lenzites saepiaria, as previously re- 
ported (Zeller, 716). In the following table the resin percent- 
age, percentage of summer wood, number of rings per inch, 
and distance from the pith are values for each lettered column 
of blocks in a sample. Whenever any of these factors are 
correlated with specific gravity or the percentage loss in 
weight, as in the plotted charts described below, the average 
values of the latter for any one lettered column are used. 
TABLE I (Series A) 
DECAY OF YELLOW PINE INDUCED BY LENZITES SAEPIARIA 
I II III IV V VI | УП [Viti] IX| X | X1 | XII 
с 8 > 
5 га Е |Ена 
v Ф e о = Ф же 6.2. m 
ЕЕ 853 | 22| 353955 ба | 58| 5 ЕРІН ЕТЕ 
28 зо Фо Е Б^ Я8В н29 On 9 на 25 Sol ama 
За 941 5921 ап ъз SEs БЕ БЕ ao ea 28 | БОР 
Q > „28 A 5b | 5 оты | д £ и 125 | ЗЕ 
2 Е Ф > = zü - ё, 49 
Shortleaf pine (Pinus echinata) 
A 101 9621 .620|17.959| .016 | 16.37) 17.5 | 15.0] .75| .660| 4.735 
A 102 8] 19.32 8.095 | 6.34 
А 103 8 3.18 778 | 20.501 | 11.59 
А 104 3| 18.217| .621 | 17.455 | 4.18 
А 107 0| 19.019 | .633 | 18.725 : 
В 101 7| 15.392 | .600 | 14.998 | 2.56] 23.3 | 10.0 | 10.0] .75) .620| 2.51 
B 102 1| 16.149 | .618 | 15.690} 2. 
В 103 3| 16.684 | .634 | 16.19 ( 
В 105 5| 16.496 | .622 | 16.175 ‹ 
В 106 3 .502 | .627 | 16.13 i 
C 101 0 .042 | .656 | 18.455 | 3. 17.1 | 30.0 | 15.0] 1.50] .678| 3.06 
С 104 0 1551 бл ЕМО 
С 105 5 .150 | .683 580 
С 106 5 .717 | .692 025 
С 107 9 .948 | .690 SLD ( 
D 101 5 490} .635 | 17.488 | 0.01} 30.5 | 35.0 | 13.0] 1.50] 671 3.88 
D 102 5 .130 | „659 | 17.459 | 
D 103 7| 18.854 | .681 | 18.091 | 4.05 
D 104 6| 18.153| .658 | 17.478 2 
D 105 9| 18.652| .668 | 17.912 97 
