Note 11 — Chapter IV · EARTHQUAKE MOTION AS DEDUCED FROM EXPERIMENT.
Reading edition
‘On the Velocity of Transmission of Earth Waves,’ by General H. L, Abbot, American, Journal of Science and Arts, vol. xv. March 1878; ‘Shock of the Explosion at Hallet’s Point,’ by Bvt. Brig.-Gen. Henry L. Abbot, read before the Essayons Club of the Corps of Engineers, Nov. 1876.