This section is from the book "A Treatise On Beverages or The Complete Practical Bottler", by Charles Herman Sulz. Also available from Amazon: A Treatise On Beverages.
Wood alcohol is an inorganic liquid compound, by the chemists called methyl. Alcohol is contained to the amount of about 1 per cent, in the aqueous portion of the distillate resulting from the destructive distillation of wood, together with acetic acid and other compounds. It should by no means be employed in the carbonator's laboratory for preparing extracts, etc. It is a well-known fact that it has been employed by extract and essence makers. In England, any manufacturer of carbonated waters using extracts made by means of this menstruum is liable to a fine of $500 under the law. Wood alcohol can be easily detected in the extracts and essences as well as in the saccharine beverages. (Apply the tests for methyl alcohol in ethyl alcohol given, on page 654).
This is a mixture of ethyl alcohol and methyl alcohol. In England it consists of a mixture of 90 per cent, of alcohol and 10 per cent, of wood spirit, which addition renders it unfit for internal administration. For use in the arts and for various laboratory purposes this methylated spirit is not subject to taxation in Great Britain.