Note 54 — LETTER XXVIII.
Reading edition
Nouv. Obs. sur les Abeilles, ii. 376—. It appears from M. Huber's experiment, that it was only when the hair-pencil, impregnated with the oil of turpentine, was presented "près de la cavité, au dessus de l'insertion de la trompe," that the bee was sensible of the odour.