Pure silver, 10 parts; pure copper, 1 part; pure brass, 2 parts; all to be filed into powder,and thoroughly mixed; place the saw level on the anvil, broken edges in contact, and hold them so; now put a small line of the mixture along the seam, covering it with a larger bulk of powdered charcoal; now with a spirit lamp and a jeweller's blow-pipe, hold the coal dust in place, and blow sufficient to melt the solder mixture; then with a hammer set the Joint smooth, and tile away any Superflous solder, and you will be surprised at its strength; the heat will not injure the temper of the saw.