Fig. 24
Fig. 24a
Fig. 24b
Again, I draw a volcano in eruption, and my wife calls it a black beetle, which hardly sounds like a triumphant success; but study the drawings, and you see that my black smoke happens to be the shape of a beetle, while the two sides of the volcano serve very well for the long feelers of an insect (Figs. [25], [25a]):
Fig. 25