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Updated: June 23, 2025
In the two posterior pairs of glands the carbonate of lime contained in the cells occasionally aggregates into small rhombic crystals or into concretions, which lie between the lamellae; but I have seen only one case, and Claparede only a very few such cases. The two anterior glands differ a little in shape from the four posterior ones, by being more oval.
Even in the rude circumferential rim or wall of wax round a growing comb, flexures may sometimes be observed, corresponding in position to the planes of the rhombic basal plates of future cells. But the rough wall of wax has in every case to be finished off, by being largely gnawed away on both sides.
Very recently a paper was read before the Mathematical Society of London by Mrs. Bryant, Sc.D., on the geometrical form of perfectly regular cell structure, illustrated by models of cube and rhombic dodecahedron. In another section, Mme. Traube Mengarini studies the function of the brain in fishes; while, in our own country, Mrs. Commonplace! Why, what is commonplace?
The figures which we have now in contemplation are so distinctly different as cannot be mistaken; the one is a rhombic figure bounded by planes; the other is a most perfect spherical form; and both these are specific figures, belonging respectively to the crystallization of those two substances.
And quite the same thing occurs with ivy, the climbing stems of which never flower, but always first produce erect and free branches with rhombic leaves. These branches have often been used as cuttings and yield little erect and richly flowering shrubs, which are known in horticulture under the varietal name of Hedera Helix arborea.
For, instead of a siliceous ground, maculated with the rhombic feld-spar, which is the common state of porphyry, the ground is uniformly crystallised, or a homogeneous regular feld-spar, maculated with the transparent siliceous substance.
The bees, of course, no more knowing that they swept their spheres at one particular distance from each other, than they know what are the several angles of the hexagonal prisms and of the basal rhombic plates.
The laminae of this fine-grained rock may be as thin as cardboard in places, and close joints may break the rock into small rhombic blocks. On the upper surface we note that the shale has weathered to a clayey soil in which all traces of structure have been destroyed.
If Sophy's boss had been any other sort of man he would have informed Sophy, sternly, that black princess effects, cut low, were not au fait in the shoe-clerk world. But Sophy's boss had a rhombic nose, and no instep, and the tail of his name had been amputated. He didn't care how Sophy wore her dresses so long as she sold shoes.
It is evident from the inspection of this fossil, that the sparry and siliceous substances had been mixed together in a fluid state; and that the crystallization of the sparry substance, which is rhombic, had determined the regular structure of the quartz, at least in some directions.
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