Note 235 — PHARMACOLOGIA. ON THE OPERATIONS OF MEDICINAL BODIES, AND ON THE CLASSIFICATIONS FOUNDED ON THEM. (continued 2)

It is a very curious fact that vegetable bitter should be so essential to the wellbeing of the higher order of animals, as explained at page 79, and yet prove so generally destructive to insects. Flies are almost immediately destroyed by an Infusion of Quassia, and Nature has protected the ear from the invasion of insects by providing an intensely bitter secretion.