282 
TIMBEE 
" The temperature of the creosote when injected into the 
timber is to be not less than 120° Fahr. and the pressure 
is to be not less than 150 lbs. per square inch." 
In the case of planking or sleepers, a parcel of say a ' 
dozen or more, dependent upon the total quantity to be 
placed in the tank, is weighed before and after creosoting, 
and the amount of creosote injected into this parcel is 
taken as the standard for the amount of creosote which 
has been injected into the tankful of timber.^ 
It is generally stated that not more than 10 lbs. of creo- 
sote per cubic foot will be paid for in pitch pine, and 12 
lbs. per cubic foot for Baltic planking and railway sleepers, 
as this is considered sufficient protection for timber in 
Great Britain, even against the sea worm, but in the neigh- 
bourhood of the Gulf of Mexico and other parts of the 
American coast infested by the teredo as much as 22 to 25 
lbs. per cubic foot is recommended, but this is difficult to 
obtain. Even in America, where the zinc chloride process 
is almost in general use, creosoting is invariably applied to 
timber structures in worm infested parts of the coast, as it 
is the only process of any use in such a situation. Pitch 
pine timber often requires to be under a pressure of 150 or 
160 lbs. per square inch for ten hours to allow of 7 lbs. of 
oil per cubic foot being injected ; Baltic timber as a rule 
does n(tt require such long pressing. 
It must be a very soft class of wood with a great deal of 
sapwood and well dried which will admit of 22 lbs. of oil 
being injected into it, but this is the quantity which the 
Louisville and Nashville Kailway Company try to get into 
timber as a protection against the teredo. 
1 See previous remarks about creosoting Oregon Pine. It is now 
being generally admitted that each species of timber requires different 
treatment, as what may be very suitable for one species is not suitable 
for others. 
