Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Welding Composition (Mix election of either)
Mix 10 election of either of the above solders de- parts borax with 1 part sal-ammoniac; fuse AMALGAMS. the mixture, and pour it on an iron plate. acid. Mexican coin is preferable, because it When cold, pulverize it, and mix it with an is purer. (See No. 3213.) equal weight of quicklime, sprinkle it on iron 3538. Amalgam for Silvering the heated to redness, and replace it in the fire. Insides of Convex Mirrors, Glass It may be welded below the usual heat.
Globes, &c. Lead and tin, of each 2 ounces; bismuth, 2 ounces; mercury, 4 ounces. Add