This, Rapidly Cooling As It Is Ejected, Forms A Ring On The Surface Of The Crust, Which, Growing Upwards By Accretion, Forms A Chimney, Eventually Nearly Or Quite Closed At The Top, So As To Form A Cone.

In this case the cone is about eighty feet above the present level of the lake, and fully one hundred yards distant from its present verge.

The whole of the inside was red and molten, full of knobs, and great fiery stalactites. Jets of lava at a white heat were thrown up constantly, and frequently the rent in the side spat out lava in clots, which cooled rapidly, and looked like drops of bottle green glass. The glimpses I got of the interior were necessarily brief and intermittent. The blast or roar which came up from below was more than deafening; it was stunning: and accompanied with heavy subterranean rumblings and detonations. The chimney, so far as I could see, opened out gradually downwards to a great width, and appeared to be about forty feet deep; and at its base there was an abyss of lashing, tumbling, restless fire, emitting an ominous surging sound, and breaking upwards with a fury which threatened to blow the cone and the crust on which it stands, into the air.

The heat was intense, and the stinging sulphurous gases which were given forth in large quantities, most poisonous. The group of cones west of this one, was visited by Mr. Green; but he found it impossible to make any further explorations.

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