98 THE BUILDING OF BEES. 
a linear inch, or twenty-five to the square inch, but this is 
incorrect. If five worker-cells measured exactly an inch, 
the number contained in a square inch would be about 
twenty-nine. As they are usually somewhat larger, the av- 
erage number in a square inch is a trifle over twenty-seven. 
Drone-cells number about eighteen, in the same area. 
L’ Abbé Collin measured the average dimensions of the 
cells very carefully, and the measurements given in his 
work (Paris, 1865) are about the same as those given above. 
Fig. 40, 
218. The queen-cells have already been described. 
(104. ) 
As bees, in building their cells, cannot pass immediately 
from one size to another, they display an admirable sagac- 
ity in making the transition by a set of irregular inter- 
mediate cells. Fig. 40 exhibits an accurate and beautiful 
representation of comb, drawn for this work from nature, 
