2. Soaking in an infusion of quassia renders the wood bitter.
3. Creosoting timber, if the smell is not objectionable.
4. Anointing the timber with oil of spike, juniper, or turpentine, is efficacious in some degree.
5. For small articles, cover freely with copal varnish in linseed oil.
TO PREVENT WORMS IN MARINE BUILDING.
1. A mixture of lime, sulphur, and colocynth with pitch.
2. Saturating the pores with coal-tar, either alone or after a solution of corrosive sublimate has been soaked and dried into the wood.
3. Sheathing with thin copper over tarred felt is esteemed the best protection for the bottoms of ships for all marine animals; the joints should be stopped with tarred oakum.
4. Studding the parts under water with short broad-headed nails.