Horizontal Pendulums and Earthquake Echoes

Abstract

I HAVE just finished reading Captain Dutton's book “Earthquakes in the Light of the New Seismology,” the preface of which was written in April, 1904, while the date of publication is 1905. I mention these dates because a paper of mine, bearing particularly on chapter vii. of the book, was read before the Physical Society on March 13, 1903, and appeared subsequently in the Proc. Phys. Soc., vol. xviii.; it also was published in the Phil. Mag. for October, 1903. I gather, however, that Captain Dutton has not seen the paper, and as I am not certain of his exact address I am addressing you.