2148. Carefully rope trees before they are cut down, that when they fall they may do no injury.
2149. When benumbed with cold, beware of sleeping out of doors; rub yourself, if you have it in your power, with snow, and do not hastily approach the fire.
2150. Beware of damps.
2151. Air vaults, by letting them remain open some time before you enter, or scattering powdered lime in them.
2152. Where a lighted candle will not burn, animal life can not exist; it will be an excellent caution, therefore, before entering damp and confined places, to try this simple experiment.