This mixture will
keep about G months in one bottle. 19. Cold soldering without fire or
lamp.--Bismuth 1/4 oz., quicksilver 1/4 oz., block tin filings 1 oz.,
spirits salts 1 oz., all mixed together. 20. To solder iron to steel
or either to brass.--Tin 3 parts, copper 39-1/2 parts, zinc 7-1/2
parts. When applied in a molten state it will firmly unite metals
first named to each other. 21. Plumbers' solder.--Bismuth 1, lead 5,
tin 3 parts, is a first-class composition. 22. White solder for raised
Britannia ware.--Tin 100 lbs., hardening 8 lbs., antimony 8 lbs.
23. Hardening for Britannia.--(To be mixed separately from the other
ingredients.) Copper 2 lbs., tin 1 lb. 21. Best soft solder for cast
Britannia ware.--Tin 8 lbs., lead 5 lbs. 25. Bismuth solder.--Tin
1, lead 3, bismuth 3 parts. 26. Solder for brass that will stand
hammering.--Brass 78.26 parts, zinc 17.41 parts, silver 4.33 parts,
add a little chloride of potassium to your borax for a flux. 27.
Solder for steel joints.--Silver 19 parts, copper 1 part, brass 2
parts, Melt all together. 28. Hard solder.--Copper 2 parts, zinc 1
part. Melt together. 29. Solder for brass.--- Copper 3 parts, zinc
1 part, with borax. 30. Solder for copper.--- Brass 6 parts, zinc 1
part, tin 1 part, melt all together well and pour out to cool. 31.
Solder for platina--Gold with borax. 32. Solder for iron.--The best
solder for iron is good tough brass with a little borax.
N. B.--In soldering, the surfaces to be joined are made perfectly
clean and smooth, and then covered with sal.
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