Part II.] Pearson: Antiseptic Treatment of Timber. 
61 
Speci¬ 
men 
No. 
Species. 
Superficial 
area of 
piece 
treated. 
Volume of 
piece 
treated. 
Weight 
of 
specimen 
before 
immersion. 
Weight 
of 
specimen 
after 
immersion. 
Weight of 
solution 
absorbed 
by 
specimen. 
Absorption 
per 
superficial 
area in 
sq. ft. 
Absorp¬ 
tion per 
cub. ft. 
sq. ft. 
cub. ft. 
lbs. 
oz. 
lbs. 
oz. 
OZ. 
OZ. 
OZ. 
1 
1125 
0-062 
3 
3*37 
3 
4-26 
0-89 
0-79 
14-51 
2 
It 
§ 
1* o 
1*125 
0-062 
3 
3-33 
3 
3-76 
0-43 
0*38 
6-88 
3 
© C 
1*125 
0-062 
3 
1*30 
3 
3*80 
2*50 
2-20 
40*00 
4 
1-125 
0-062 
3 
2-76 
3 
7-75 
4-99 
4-40 
79-84 
5 
ffirt 
2 <3 
§ a 
© u 
.© P3 
1*125 
0*062 
3 
3*76 
3 
7*92 
4-16 
3-69 
66-56 
6 
1*125 
0-062 
3 
3-50 
3 
8-75 
5-26 
4*67 
8416 
7 
1125 
0-062 
3 
1-50 
3 
9-87 
8*37 
7*44 
135*00 
The most interesting feature shown by the above figures is the 
amount of absorption of the oil by specimens Nos. 1 and 2. The first 
specimen, it will be remembered, was treated for 15 minutes in the hot 
solution and allowed to remain a further 45 minutes in the fluid while 
it cooled down, the second was immersed for 60 minutes in the hot 
solution and then removed. The absorption by No. 1 was 0*89 oz. as 
against 0'43 by No. 2 or slightly over double the amount; this was no 
doubt due to the suction brought into play by the vacuum and caused by 
contraction on cooling. As regards the depth to which the oil penetrated 
into the various pieces of wood, in Nos. 1 and 2 it was hardly more than 
one-sixteenth of an inch, the distance being slightly greater in the case 
of No. 1 than in the case of No. 2, in No. 3 it was one-fourth on the 
sides and one-half at the ends, while owing to the large wood vessels in 
this timber the fluid had penetrated down the channels so that on the 
specimen being cut open, the surface appeared to be dotted with small 
dark points, showing sections of the cells impregnated with oil. Nos. 4 
and 5 on being sawn open showed a greater penetration of the fluid 
than was the case in No. 3, the surface of the cut presenting a 
blotchy appearance; No. 6 was similar in appearance to Nos. 4 and 5 but 
more heavily impregnated, while No. 7, which had been in the solution 
for 24 hours, was heavily saturated throughout. 
( 134 ) 
