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 describes additives or treatments for food or drink that are now known to be toxic and are prohibited in food today.
This information has been left in for historical purposes but should not be acted upon.
Essential Oils
Cognac Oil
Oil of cognac is prepared by dissolving the fusel oil of brandy marc in strong rectified spirit, and then adding a sufficient quantity of…
Oil of Apple
Mix cautiously 1 part fusel oil, 3 parts sulphuric acid, and 2 parts water. Dissolve 24 parts bichromate of potash in 44 parts water…
Oil of Jargonelle Pear
This is made from the heavy fusel oil which comes over last in distillation. To purify the fusel oil, wash it with soda and water, and…