Part II.] Pearson : Antiseptic Treatment of Timber. 53 
Tkbated. 
Untkeated. 
Register 
Setial 
No. 
| Species. 
Laid down 
on 
Condition 
on 
Register 
Serial 
No. 
Laiddown Condition on 
96 
Buchanania latifolia . 
13th Nov- 
1909. 
16th 
Aug. 1910. 
Sound. 
97 
13th Nov. Badly attacked by 
1909. white-ants and 
1 taken up on 16tli 
August 1910. 
98 
Acacia Catechu . 
Do. 
Do. 
99 
j Do. . Sound on 16th 
August 1910. 
100 
Pongamia glabra . 
26th Dec- 
1909. 
Do. 
101 
Do. . Ditto. 
102 
Vitex altissima . 
Do. . 
Do. 
103 
Do. . Ditto. 
104 
Bauhinia malabarica . 
Do. . 
Do. 
105 
Do. . Ditto. 
From the above table it will be seen that with the exception of one 
specimen (Garuga piunata ) all the treated specimens were sound on the 
date of inspection, while of the untreated specimens ten have been so 
badly attacked as to necessitate their removal, and several others are by 
no means doing well. 
The above experiments are all on a laboratory scale ; arrangements 
have been made to powellize 5,000 sleepers of five different species, 
which after treatment will be laid on open lines and kept under observa¬ 
tion. 
Cost of Treatment. 
The cost in Bombay, as charged by the Company, for treating sleep¬ 
ers is 5 annas per cubic foot, which works out to Rl-0-6 per B. G. 
sleeper. The Chief Engineer, Western Australia Railways, gives the 
price as Id. per sleeper of 1*9 cubic foot or 3*68^. per cubic foot, plus 
royalty to the patentees. Mr, Ryan quotes the figure of £0-5-8 for treat¬ 
ing 50 cubic feet in such localities where sugar is cheap exclusive of 
royalty charges. It should be mentioned here that the plant now in Bom¬ 
bay is more of the nature of an experimental plant, and that were the 
processing to be carried out on a large scale the cost of treating the tim¬ 
ber would probably be reduced. Estimates as to cost of plant can be ob¬ 
tained from the Agents to the Company, Messrs. Killick, Nixon & Co., 
Bombay. 
Summary. 
The Powellizing or Saccharine process is a comparatively new method 
of preserving timber. As compared with other Open Tank processes the 
( 126 ) 
