Botanical name: 
Mentha x piperita

Format explanation.
Related entry: Menthol

Menthol, in powder 5.00 | 50 grains
Ammonium Chloride, in powder 10.00 | 100 grains
Boric Acid, in powder 20.00 | 200 grains
Lycopodium 65.00 | 650 grains

Mix the powders.

The British Pharmaceutical Codex, 1911, was published by direction of the Council of the Pharmaceutical Society of Great Britain.