CONTENTS. 
SEISMOMETRY. 
CHAP. PAGE 
I. General Dynamical Theory of Seismographs . ; 2 . I 
II. Methods of attaining Sensitiveness, Damping, Registration . 7 
III. Chief Types of Seismographs in Actual Use. Milne, Omori, 
Bosch, Wiechert, Galitzin . : é : : : PS a6 
IV. Standardization of Seismographs, including Theory of 
Mechanical and Electromagnetic Registration . 5 fi e2n 
V. Installation of Seismographs and Consideration of Develop- 
ment of Instruments ‘ 4 : . 5 5 5 BO 
SEISMOGEOPHYSICS. 
VI. Theory of a Solid Isotropic Earth . : : : : 37 
VII. Interpretation of Seismograms and the Interior of the Earth . 48 
VIII. Determination of Epicentre and Focus . : s : O38 
IX. Seismic Effects other than those due to Earthquakes see. 
X. Statistical . “ : é ‘ , : f ; OS 
vi 
