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.
Home › Preservatives › To Petrify Wooden Objects
To Petrify Wooden Objects
1690. Metallic Freezing Mixture.
Take equal quantities of gem-salt, rock-alum, An interesting experiment may be made by white vinegar, chalk and pebbles, powdered. melting together 59 parts tin, 103½ lead, and Mix all these ingredients; ebullition will ensue. 183 bismuth. If this be finely rasped or After it has ceased, throw some wooden objects into this liquid, and let them soak for 4 or 5 days, at the end of which time they will be transformed into petrifactions. powdered, and introduced into 108 parts, by weight, of quicksilver, a thermometer immersed in the mixture will sink to nearly 30 Fahr.; and water placed in a thin test-tube, 3 DISINFECTANTS. and allowed to remain for a few minutes in 1693. Metropolitan Disinfecting this bath, will be completely frozen.
Fluid. The Board of Health of the city of