Cement For Ivory.
Cement For Belts.
Cement For Chemical Apparatus.
Size Over Portland Cement.
Aquarium Cements.—
| I.— | Litharge | 3 ounces |
|---|
| Fine white sand | 3 ounces |
| Plaster of Paris | 3 ounces |
| Rosin, in fine powder | 1 ounce |
| Linseed oil, enough. |
| Drier, enough. |
Mix the first three ingredients, add sufficient linseed oil to make a homogeneous paste, and then add a small quantity of drier. This should stand a few hours before it is used. It is said that glass joined to iron with this cement will break before it will come loose.
| II.— | Litharge | 1 ounce |
|---|
| Fine white sand | 1 ounce |
| Plaster of Paris | 1 ounce |
| Manganese borate | 20 grains |
| Rosin, in fine powder | 3 1/2 pounds |
| Linseed varnish oil, enough. |
III.—Take equal parts of flowers of sulphur, ammonium chloride, and iron filings, and mix thoroughly with boiled linseed oil. Finally, add enough white lead to form a thin paste.
| IV.— | Powdered graphite | 6 parts |
|---|
| Slaked lime | 3 parts |
| Barium sulphate | 8 parts |
| Linseed varnish oil | 7 parts |