After the lakes came the cones. When the surface of this lava is so rapidly cooling that the action below is too weak to break it, the gases forcing their way out break small vents, through which lava is then ejected. This, cooling rapidly as it comes to the outer air, forms by its accretions a conical pipe of greater or less circumference, and sometimes growing twenty or thirty feet high, open at the top, and often with openings also blown out at the sides. There are several of these cones on the summit bank of the lake, all ruined, as it seemed to me, by some too violent explosion, which had blown off most of the top, and in one case the whole of it, leaving then only a wide hole.
Into these holes we looked, and saw a very wonderful and terrible sight. Below us was a stream of lava, rolling and surging and beating against huge, precipitous, red-hot cliffs; and, higher up, suspended from other, also red or white hot overhanging cliffs, depended huge stalactites, like masses of fiercely glowing fern leaves waving about in the subterraneous wind; and here we saw how thin was in some such places the crust over which we walked, and how near the melting-point must be its under surface. For, as far as we could judge, these little craters or cones rested upon a crust not thicker than twelve or fourteen inches, and one fierce blast from below seemed sufficient to melt away the whole place. Fortunately one can not stay very long near these openings, for they exhale a very poisonous breath; and so we were drawn back to the more fascinating but less perilous spectacle of the lakes; and then back over the rough lava, our minds filled with memories of a spectacle which is certainly one of the most remarkable our planet affords.
When you have seen the fiery lakes you will recognize a crater at sight, and every part of Hawaii and of the other islands will have a new interest for you;
[Illustration: VIEW OF THE CRATER OF SOUTH LAKE IN A STATE OF ERUPTION, FROM THE CREST OF THE NORTH LAKE.]
for all are full of craters, and from Kilauea to the sea you may trace several lines of craters, all extinct, but all at some time belching forth those interminable lava streams over which you ride by the way of the Puna coast for nearly seventy miles back to Hilo.