8. Don’t read newspapers when on duty.

9. Don’t fire up too quickly.

10. Don’t let any water or dampness come on the outside of your boiler.

11. Don’t let any dampness get into the boiler and pipe coverings.

12. Don’t fail to see that you have plenty of water in the boiler in the morning.

13. Don’t fail to keep the water at the same height in the boiler all day.

14. Don’t let any one talk to you when firing.

15. Don’t allow water to remain on the floor about the boiler.

16. Don’t fail to blow off steam once or twice per day according as the water is more or less pure.

17. Don’t fail to close the blow-off cock, when blowing off, when the water in the boiler has sunk to one and a half inches.