M. L'Huillier, professor of Geneva, values the economy of the bees at 1/51 of the whole expense; and he shows that it might have been one-fifth if the bees had no other circumstances to attend to; but he concludes, that if it is not very sensible in every cell, it may be considerable in the whole of a comb, on account of the mutual setting of the two opposite orders of cells. Huber, Nouvelles Observations, &c. ii. 34.
[831] Memoirs of the Wernerian Society, ii. 259. This however has been denied, and seems inconsistent with the account given by Huber hereafter detailed.
[832] Vide Mon. Ap. Ang. t. 12. * * e. 1. neut. fig. 19.
[833] Reaum. v. 424.
[834] Nouvelles Observations sur les Abeilles, par François Huber, ii. 101-288. I have observed the bees collecting propolis in the spring from the buds of Populus balsamifera.
[835] Lindley in R. Military Chronicle, March 1815. 449.
[836] Apis. **. e. 2. K.
[837] Huber, Linn. Tr. vi. 215-298.
[838] Reaum. vi. 7-10.
[839] Memoirs of the Wernerian Society, ii. 260.