1. "POOR IRON, — To Improve. — Black oxide of manganese 1 part; copper and common salt 4 parts each; dissolve in soft water and boil until dry; when cool pulverize and mix quite freely with nice welding sand.
When you have poor iron which you cannot afford to throw away, heat it and roll it in this mixture, working for a time, re-heating, will soon free it from injury, which is the cause of its rottenness. By this process you can make good horse-nails, even out of only common iron. "
2. "Welding a Small Piece of Iron Upon a Large One, with Only a Light Heat. — It is often desirable
to weld a small bit of iron upon a large bar, when the large piece must be heated equally hot as the small one. To save this: Take borax 1 lb.; red oxide of iron 1 to 2 ozs.; melt them together in a crucible ; and when cold, pulverize it and keep that powder dry for use.
When you want to perform the operation, just bring the large piece to a white heat, having a good welding heat upon the small slip ; take the large one from the fire, and sprinkle some of the powder upon the place, and bring the Other upon it, applying the hammer smartly, and the weld will be as good as could be made with the greater heat without the powder. "
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