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.
In addition, this page presents medical treatment from an era before modern medicine. The remedies described are ineffective against the conditions named, and some of the ingredients or doses are harmful. Do not use them to treat any illness; consult a qualified medical professional.
This information has been left in for historical purposes but should not be acted upon.
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Alloy for Filling Teeth
An alloy, which is sold in commerce in the shape of large, almost white filings, shows upon analysis the following composition Tin, 611; silver, 388; copper, 1. The alloy is to be amalgamated before use by warming it in a spoon with a little mercury. The combination takes place rapidly, and the amalgam, while still warm, is pressed in a piece of soft leather, whereby the excess of mercury is romoved. It is now far preferable to the celobrated copper amalgam, as it retains its white color in the mouth, while the other turns dark. The hardness is a little less than that of the copper amalgam. (See No. 3542.)