"13. If necessary to go into an old vault or well, first introduce a burning candle. If the light burns low and finally goes out, carbonic acid gas is present and the place is unsafe to enter. Unslaked lime will absorb the gas and purify the air.
"14. Avoid walking on railroad tracks and icy sidewalks.
"15. When awake, very young children should never be left alone.
"16. Do not go, with loose hair or flowing garments, near dangerous machinery.
"20. Fill and trim your lamps in the day-time. Never trim or fill a lighted lamp.
"21. Keep matches in a closed metallic box.
"22. Have your horses rough-shod as soon as the ground freezes.
"23. When feeling dizzy or seasick, lie down.
"24. Do not close the damper of your stove too early. Better waste coal than run the risk of suffocation by gas.
"25. When climbing a ladder, look up and not down.
"26. In railroad traveling take the center of the car, and the middle car of the train, for safety.
"27. Eat only pure food, drink only pure liquids, think only pure thoughts, and keep your blood pure.
"28. In going through dry woods or over prairies do not smoke or cast matches about carelessly. There should be laws against this often wanton destruction of property.
"29. Look out for spontaneous ignition of oily rags, oil-painted canvas rolled up, wet iron filings.
"30. In entering mines not used, always try for gas before venturing into them.
"31. Do not be careless in any way whatever in connection with fire. The losses in the United States, in 1889, by fires as a result of carelessness amounted to nearly $100,000,000, while in San Francisco for the same year we find that fully 80% of the losses can be attributed to the same source."
