Part 397

I.—Soak 8 pounds of glue in as much water as it will absorb. When there is no visible water, treat the glue till melted, and add 7 pounds of hot molasses.

II.—Glue (summer) 8 pounds Glue (winter) 4 pounds Molasses 1 gallon

III.—Molasses 12 pounds Glue 4 pounds

IV.—Molasses 24 pounds Glue 16 pounds Paris white 2 pounds

V.—Glue or gelatin 64 pounds Water 48 pounds Linseed oil 96 pounds Molasses or sugar 64 to 96 pounds Chloride of calcium 3 pounds Powdered rosin 8 pounds

Soak the glue in the water and then liquefy by heat. Then stir in the oil, first heated to 150° F. Then add the molasses and the chloride of calcium, and finally the fused rosin. The latter ingredient is only to be added when very tough rollers are required. This recipe is interesting from the inclusion in it of the hygroscopic salt, chloride of calcium, the object of which is obviously to keep the rollers moist.

ROOFS, HOW TO LAY GALVANIZED: See Household Formulas.

ROOFS, PREVENTION OF LEAKAGE: See Household Formulas.

ROOF PAINTS: See Paint.

ROOM DEODORIZER: See Household Formulas.

«ROPES.»

To protect ropes, cordage, and cloths made of flax and hemp against rot, it has been recommended to leave them for 4 days in a solution of copper sulphate, 20 parts by weight to a liter, then allow them to dry, and then, to prevent the copper sulphate being washed away by the water, place in tar or a solution of soap—1 to 10. In the latter case an insoluble copper soap is formed. To secure the same result with twine, the following process has been recommended: Place the string for an hour in a solution of glue, then allow to dry, and place in a solution of tannin. After removal from the tannin, again dry, and soak in oil. The process first described has been shown by experience to be very effective; but to prevent the washing away of the copper sulphate, it is advisable to use the solution of soap in preference to the tar, as articles steeped in the latter substance are apt to become stiff, and consequently brittle. The {618} treatment with glue and tannin in the second process has the drawback that it tends to make the string too stiff and inflexible, and thus impair its usefulness.

ROPE LUBRICANTS: See Lubricant.

ROPES, WATERPROOFING: See Waterproofing.

ROSE CORDIAL: See Wines and Liquors.

ROSEWOOD: See Wood.

ROSE POWDERS: See Cosmetics.

ROSIN, TESTS FOR, IN EXTRACTS: See Foods.

ROSIN OIL: See Oil.

ROSIN STICKS: See Depilatories.

«ROT:»

«Remedies for Dry Rot.»—A good remedy for dry rot is petroleum. The sick parts of the wood are painted with it, which causes the fungi to die, turn black, and finally drop off. The best preventive of dry rot is plenty of draught. If the portions are already affected so badly that they must be removed and renewed, the freshly inserted wood is coated with “carbolineum” to prevent a fresh appearance of dry rot. Another remedy is ordinary salt, which is known to have a highly hygroscopic action. It absorbs the moisture of the wood, whereby it is itself dissolved, thus gradually impregnating the planks, etc. In order to combat dry rot with salt, proceed as follows: Throw salt into boiling water until a perfectly saturated solution is obtained. With this repeatedly wash the wood and masonry afflicted with dry rot. Wherever practicable the salt may be sprinkled direct upon the affected place.

ROUGE: See Cosmetics.

«ROUGE FOR BUFF WHEELS.»

The rouge employed by machinists, watchmakers, and jewelers, is obtained by directly subjecting crystals of sulphate of iron or copperas to a high heat by which the sulphuric acid is expelled and the oxide of iron remains. Those portions least calcined, when ground, are used for polishing gold and silver. These are of bright crimson color. The darker and more calcined portions are known as “crocus,” and are used for polishing brass and steel. Others prefer for the production of rouge the peroxide of iron precipitated by ammonia from a dilute solution of sulphate of iron, which is washed, compressed until dry, then exposed to a low red heat and ground to powder. Of course, there are other substances besides rouge which are employed in polishing, as powdered emery, kieselguhr, carborundum, rotten stone, etc.

ROUGE POWDER: See Polishes.

ROUGH STUFF: See Wood.

ROUP CURES: See Veterinary Formulas.