" "Can you tell us what happens when a drop of bloodsay from a cut fingerfalls upon a surface such as the bottom of an iron safe?" "A drop of blood from a living body falling upon any non-absorbent surface will, in the course of a few minutes, solidify into a jelly which will, at first, have the same bulk and colour as the liquid blood.

This is liquid in life, but becomes solidified after death.

To cite them all would not be an easy thing to do, and so we shall recall but three: (1) It has been considered as the result of eruptions of bitumen coming from the depths, and covering and penetrating masses of leaves, branches, bark, wood, roots, etc., of trees that had accumulated in shallow water, and whose most delicate relief and finest impressions have been preserved by this species of tar solidified by cooling.

But the oil, even when crystallized by artificial means, does not produce such good camphor as that already solidified in the tree.