My paper on the Culm-measures at Bude has elicited two communications, from Messrs W. Maynard Hutchings and Alfred Harker, on which I desire to offer a few comments.

I take this opportunity of saying that I am extremely glad to find that the conclusion at which I arrived regarding the impotence of pressure alone to produce metamorphism is in accord with the published views of my friend Mr. J. J. Harris Teall. “Pressure” alone, he states, in a footnote at p. 410 of his valuable work, British Petrography, “produces no effects on rocks—work must be done upon rocks before change takes place.” This footnote escaped my memory at the time of writing my paper, or I should have called attention to it.