i>ART II.] Pearson: Antiseptic Treatment of Timber . 91 
The cost of treating B. G. sleepers withBellifc is low according to the 
above figures which closely resemble those given on page 29, Chapter II, 
for the treatment of sleepers with Chloride of Zinc, while the cost is 
hardly one-fourth that of treating timber with Creosote oils. 
Past Records. 
No records are available for India, as the above-mentioned pieces of 
treated timber have only been in the ground a month, nor are any reliable 
data available from Europe, as the process is a comparatively new one. 
It is, however, very highly recommended by Hauptmann B. Malenkovic, 
whose opinion in such matters deserves every consideration. 
Summary. 
There can be no doubt that this method of treating timber is extremely 
cheap, Time alone can prove its value, the fear being that the salt may 
be washed out of the timber in spite of the small quantities of Phenol 
which it contains. Provided the salt is a good antiseptic, its use together 
with small quantities of the heavier oils of creosote which together would 
not make the cost of treatment excessive, might well prove of great 
value. 
(n) CRESOL-CALCIUM. 
Cresol-Calcium. 
Cresol-Calcium 1 is a new antiseptic solution the composition of 
which has been fully discussed on page 3-3, Chapter II. It can be used 
for treating timber by the Open Tank Method, but is more com¬ 
monly forced into the timber under pressure. A five per cent, solution 
is recommended by the inventors for impregnation under pressure, but if 
used in the Open Tank process a stronger solution is necessary. The 
Company in their prospectus compare the cost of treating timber with 
1 Cresol-Calcium is procurable from Blagden Waugh & Co., 50-51, Lime Street, 
London, E. C., England. 
( 164 ) 
