es make a coloring for tattooing.

(*13) In mines and natural caves we find a species of cryptogamous
_fungus_ that emits an intense phosphorescence.

(*14) The orchis, scabius and valisneria.

(*15) The corolla of this flower (_Aristolochia Clematitis_), which is
tubular, but terminating upwards in a ligulate limb, is inflated into a
globular figure at the base. The tubular part is internally beset with
stiff hairs, pointing downwards. The globular part contains the
pistil, which consists merely of a germen and stigma, together with the
surrounding stamens. But the stamens, being shorter than the germen,
cannot discharge the pollen so as to throw it upon the stigma, as the
flower stands always upright till after impregnation. And hence, without
some additional and peculiar aid, the pollen must necessarily fan down
to the bottom of the flower. Now, the aid that nature has furnished in
this case, is that of the _Tiputa Pennicornis_, a small insect, which
entering the tube of the corrolla in quest of honey, descends to the
bottom, and rummages about till it becomes quite covered with pollen;
but not being able to force its way out again, owing to the downward
position of the hairs, which converge to a point like the wires of a
mouse-trap, and being somewhat impatient of its confinement it brushes
backwards and forwards, trying every corner, till, after repeatedly
traversing the stigma, it covers it with pollen sufficient for its
impregnation, in consequence of which the flower soon begins to droop,
and the hairs to shrink to the sides of the tube, effecting an easy
passage for the escape of the insect."--_Rev. P. Keith-System of
Physiological Botany_.

(*16) The bees--ever since bees were--have been constructing their
cells with just such sides, in just such number, and at just such
inclinations, as it has been demonstrated (in a problem involving the
profoundest mathematical principles) are the very sides, in the very
number, and at the very angles, which will afford the creatures the most
room that is compatible with the greatest stability of structure.

During the latter part of the last century, the question arose among
mathematicians--"to determine the best form that can be given to the
sails of a windmill, according to their varying distances from the
revolving vanes, and likewise from the centres of the revoloution." This
is an excessively complex problem, for it is, in other words, to find
the best possible p