2158. Never throw pieces of orange-peel, or broken glass bottles, into the streets.
2159. Never meddle with gunpowder by candle-light.
2160. In trimming a lamp with naphtha, never fill it. Leave space for the spirit to expand with warmth.
2161. Never quit a room, leaving the poker in the fire.
2162. When the brass rod of the stair-carpet becomes loose, fasten it immediately.