WATCHMAKERS’ FORMULAS

Watch Manufacturers’ Alloys.

Some very tenacious and hard alloys, for making the parts of watches which are not sensitive to magnetism, are as follows:

	I	II	III	IV	V	VI	VII
Platinum	62.75	62.75	62.75	54.32	0.5	0.5	—
Copper	18	16.20	16.20	16	18.5	18.5	25
Nickel	18	18	16.50	24.70	—	2	1
Cadmium	1.25	1.25	1.25	1.25	—	—	—
Cobalt	—	—	1.50	1.96	—	—	—
Tungsten	—	1.80	1.80	1.77	—	—	—
Palladium	—	—	—	—	72	72	70
Silver	—	—	—	—	6.5	7	4
Rhodium	—	—	—	—	1	—	—
Gold	—	—	—	—	1.5	—	—

A non-magnetic alloy for watch-springs, wheels, etc.: Gold, 30 to 40 parts; palladium, 30 to 40 parts; copper, 10 to 20 parts; silver, 0.1 to 5 per cent; cobalt, 0.1 to 2.5 per cent; tungsten, 0.1 to 5 per cent; rhodium, 0.1 to 5 per cent; platinum, 0.1 to 5 per cent.

An Alloy For Watch Pinion Sockets.

Replacing Rubies Whose Settings Have Deteriorated.

To Straighten Bent Teeth.

To Renew A Broken Barrel Tooth.

Heated Sawdust.

To Repair A Dial, Etc., With Enamel Applied Cold.

Lettering A Clock Dial.

Verification Of The Depthings.

To Make Or Enlarge A Dial Hole.

To Repair A Repeating Clock-bell.

A seconds pendulum of a regulator, which has no compensation for temperature will cause the clock to lose about {738} 1 second per day for each 3 degrees of increase in heat. A watch without a compensation balance will lose 6.11 seconds in 24 hours for each increase of 1° F. in heat.

To Remedy Worn Pinions.

Watchmakers’ Oil.

II.—Stir up for some time best olive oil with water kept at the boiling point; then after the two fluids have separated, decant the oil and shake up with a little freshly burned lime. Let the mixture stand for some weeks in a bottle exposed to the sunlight and air, but protected from wet and dirt. When filtered, the oil will be nearly colorless, perfectly limpid, and will never thicken or become rancid.