Cements For Iron.
II.—Sulphur flowers, 6 parts; dry white lead 6 parts, and powdered borax, 1 part. Mix by sifting and keep as a dry powder in a closed tin box. To use, make into a thin paste with strong sulphuric acid and press together immediately. This cement will harden in 5 days.
| III.— | Graphite | 50 pounds |
|---|---|---|
| Whiting | 15 pounds | |
| Litharge | 15 pounds |
Make to a paste with a boiled oil.
IV.—Make a paste of white lead and asbestos.
V.—Make a paste of litharge and glycerine. Red lead may be added. This also does for stone.
VI.—Make a paste of boiled oil of equal parts of white lead, pipe clay, and black oxide of manganese.
VII.—Make iron filings to a paste with water glass.
| VIII.— | Sal ammoniac | 4 ounces |
|---|---|---|
| Sulphur | 2 ounces | |
| Iron filings | 32 ounces |
Make as much as is to be used at once to a paste with a little water. This remark applies to both the following dry recipes: