FU′SIBLE ALLOY′

Syn. Fusible metal . Prep. 1. Bismuth, 2 parts; lead, 5 parts; tin, 3 parts. Melts in boiling water. 2. (D’Arcet’s.) Bismuth, 8 parts; lead, 5 parts; tin, 3 parts. Melts below 212° Fahr. 3. (Walker.) Bismuth 8, tin 4, lead 5 parts; antimony, 1 part. The metals should be repeatedly melted and poured into drops, until they are well mixed. 4. (Onion’s.) Lead, 3 parts; tin, 2 parts; bismuth, 5 parts. Melts at 197° Fahr. 5. To the last, after removing it from the fire, add of quicksilver (warm), 1 part. Liquid at 172°, solid at 140° Fahr. Obs. The first four of the above are used to make TOY-SPOONS , to surprise children by their melting in hot liquors. A little mercury may be added to lower their melting points. Nos. 2 and 3 are specially adapted for making ELECTROTYPE MOULDS . The beautiful casts of the French medals known to all electrotypers as Clichée moulds are in the alloy No. 3. The above alloys are also used to form PENCILS for writing on a es’ skin, or paper prepared by rubbing burnt hartshorn into it, .; also as a METAL BATH in the laboratory. The last is used for ANATOMICAL INJECTIONS .