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.