_Spearmint._
Cold water extracts the more agreeable and active parts of mint in a few
hours; a longer maceration extracts the grosser and less agreeable
portions; hot water more quickly extracts its virtues, but if it be
boiling it dissipates the aroma. OFFICINAL PREPARATIONS. _Aq. Menth.
virid._ L.D. _Infus. Menth. comp._ _D. Ol. Menth. virid._ L. D. _Spir.
Menth. virid._ L.