Science from an Easy ChairLankester, E. Ray (Edwin Ray), Sir
History
Science from an Easy Chair
Lankester, E. Ray (Edwin Ray), Sir
Natural history; Science
I have sometimes been asked to give advice as to the best method of
destroying the furniture worm or grub. If the piece of furniture (or its
pieces) can without injury be “baked” in a hot chamber for twenty-four
hours, at a temperature a little above that of boiling water, that is
the easiest method of destroying the pest. Or, again, I should suggest
placing the piece of furniture in a refrigerating chamber for a week or
two. If neither of these methods can be used, the piece of furniture
should be placed in a very hot room, and creosote or bisulphide of
carbon or solution of cyanide of potassium should be injected with a
very fine-nosed syringe into the little circular holes of the burrows on
the surface of the wood; then the piece of furniture must be at once
exposed to the cold, which will cause the air to be drawn into the
burrows and diffuse the volatile poison within. The “worm holes” on the
surface should, as soon as the piece of furniture is quite cold, be
closed by melted paraffin. If the piece of wood which it is desired to
“cure” will stand submersion in water for a few minutes, and is not
larger than a cricket bat, it is, of course, easy, by first warming it
through and then plunging it into water containing corrosive sublimate
or other poison, fairly to impregnate the burrows, and make an end of
the beetles and their grubs. Painting is the common and approved means
of protecting wood against these attacks, and in some positions metal
sheathing is used. The method most largely used for protecting wood in
the open air against “worm” and “mould” is that of forcing creosote into
its pores—an improvement on the old system of painting with coal tar. A
more expensive but beautiful method of protecting wood is to force hard
paraffin in a melted condition by pressure into the pores. The wood
becomes wonderfully firm and waterproof. Neither damp and mould, nor
boring insect, nor shrimp can then penetrate it. This method was
introduced some years ago, but I do not know whether it has been largely
used.
XXXIX
CHRISTMAS FARE
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