These ejections were followed by dark sand, with lapilli and small fragments of scori of the same colour.
Evidently the only things thrown out from them have been gases, volcanic ashes, and lapilli.
The lapilli and the ashes were carried to greater distances.
With the lapilli, and sometimes without them, the smoke carried a very minute dust or sand, which is generally called ashes.
The solid matter thrown out by volcanoes consists of lapilli, scoriae, dust and bombs.
We observed, that when lava abounded, the projection of rocks and lapilli either ceased altogether, or became of small amount.
A cubic mile of material is said to have been thrown out in the form of lapilli and dust by the successive explosions.
There was no pumice shown to me, but the dust and lapilli all seemed to be composed of comminuted old rock.