Note 28 — Chapter VI
Reading edition
"A similar membrane terminates each foot of a common fly: beneath which a vacuum takes place, and the animal maintains a footing upon ceilings, owing to the pressure of the external air upon this membrane."
Reading edition
"A similar membrane terminates each foot of a common fly: beneath which a vacuum takes place, and the animal maintains a footing upon ceilings, owing to the pressure of the external air upon this membrane."