6 BULLETIN 1231, U. S. DEPARTMENT OF AGRICULTURE. 
One hundred and eight untreated check stakes were also set in the 
ground with these treated stakes, 54 entirely of heartwood (numbered 
from 194 to 247), the others with some sapwood; stakes treated by 
each method or chemical were so arranged that there was an even 
distribution of treatments throughout the test area. (See fig. 1 for - 
arrangement of stakes; also Pl. ie Hie D:) 
In October, 1916, at was necessary, on account of change in location 
of laboratory, to move all the treated woods to a new plot near by. 
The locality in Virginia where these stakes were set is one in 
which termite colonies of several species of Reticulitermes were 
abundant, A. flavipes Kol. being the most common termite. No. 
attempt was made to hasten normal attack by termites, hence the 
EE FLEE 
eae lee ey BOBOGKEE 
e[>[-[elelel=telelo|=[olel™ 
Xx 
x x 
© OPEN TANK COAL TAR CREOSOTE /-l2. Wl OPEV TANK WOOD CRKOSOTE 13-24. 
O DIPPED HIGH-GRADE CARBALINEU/I 97-108. @ BRUSHED COAL TAR CREOSOTE 49-60, 
(®) Y SRUSHED HIGH-GRADE CARBOLINEUM 85-36. ¢ O/PPED WOOD CREOSOTE 6/-72, 
\o O DIPPED COAL TAR CREOSOTE 37-48, KX SOME SAPHOOD. 
% GRUSHED HOOD CREOSOTE 72-84. @© 4244 HERAT HOOD. 
@ CHFRRED 25-26. 
Fig. 1.—Arrangement of experimental stakes at Falls Church, Va. 
test 1s essentially a service test. Some of the untreated stakes had 
become infested by March, 1913; after one year 57 and after 25 
months 95 of the first lot of untreated stakes were attacked by 
termites. 
On May 21, 1913, additional 2 by 4 inch southern yellow-pine 
stakes were set, in the ground, which were treated by more permanent 
methods of impregnation by a commercial wood-preserving com- 
pany, using coal-tar creosote oils and wood creosote. Analyses of 
these coal-tar creosote oils were made by the manufacturer, whereas 
the wood creosote was analyzed by the United States Bureau of 
Chemistry, with the results shown in Table 2. 
In addition to being attacked by termites both untreated check 
and treated stakes were also attacked by wood-boring beeties, espe- 
~~ vee 
