They are mostly solid, glassy-looking substances insoluble in water, but soluble in alcohol and wood spirit.
As a similar result is obtained with wood spirit, this must be proved to be absent before applying this test.
This may be done whether they have been varnished or not, by means of a tuft of cotton wool dipped in wood spirit.
A modification of this test is applied to the detection of wood spirit in common alcohol.
What comes over in the form of vapour is a mixture of water, acetone and wood spirit.
The precipitate is soluble in acetone, which is always present in wood spirit.
In northern Europe the wood spirit, Ljesche, is believed to have a goat's horns, ears and legs.
Chloroform made from wood spirit is said to be more impure than that from alcohol.