| → as he adds, 1866 1869 |
| OMIT 1872 |
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| → have the power of forming 1866 1869 1872 |
| make 1859 1860 1861 |
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| → apparently 1859 1860 1861 1866 1869 |
| in wood, apparently 1872 |
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| → largely; 1859 1860 1861 1866 1869 |
| to a certain extent; 1872 |
|
| ↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872 |
| By such modifications of instincts which in themselves are not very wonderful,— hardly more wonderful than those which guide a bird to make its nest,— I believe that the hive-bee has acquired, through natural selection, her inimitable architectural powers.
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both layers be formed, there will result a double layer of hexagonal prisms united together by pyramidal bases formed of three rhombs; and the rhombs and the sides of the hexagonal prisms will have every angle identically the same with the best measurements which have been made of the cells of the hive-bee. But I hear from Prof. Wyman, who has made numerous careful measurements, that the accuracy of the workmanship of the bee has been greatly exaggerated; so much so,
→as he adds,
whatever the typical form of the cell may be, it is rarely, if ever, realised. |
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we may safely conclude
if we could slightly modify the instincts already possessed by the Melipona, and in themselves not very wonderful, this bee would make a structure as wonderfully perfect as that of the hive-bee. We must suppose the Melipona to
→have the power of forming
her cells truly spherical, and of equal sizes; and this would not be very surprising, seeing that she already does so to a certain extent, and seeing what perfectly cylindrical burrows
many insects
→apparently
by turning round on a fixed point. We must suppose the Melipona to arrange her cells in level layers, as she already does her cylindrical cells; and we must further suppose, and this is the greatest difficulty, that she can somehow judge accurately at what distance to stand from her fellow-labourers when several are making their spheres; but she is already so far enabled to judge of distance, that she always describes her spheres so as to intersect
→largely;
and then she unites the points of intersection by perfectly flat surfaces. ↑
We have further to suppose, but this is no difficulty, that after hexagonal prisms have been formed by the intersection of adjoining spheres in the same layer, she can prolong the hexagon to any length requisite to hold the stock of honey; in the same
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