PLATE 
I. 
iS) 
bo 
7A. 
7B. 
10. 
If. 
12. 
B3: 
Sai Ok arly AGS 
Milne Horizontal Seismograph for one Hori- 
zontal Component . : : : . facing page 
. Wiechert Astatic Inverted Pendulum Seismo- 
graph for two Horizontal Components 
. Galitzin Aperiodic Horizontal Component Seis- 
mograph, with Galvanometer and Record- 
ing Cylinder for electromagnetic registra- 
tion . 
. Galitzin Aperiodic Vertical Component Seismo- 
graph for electromagnetic registration . i, a 
. Time Curves (after Z6ppritz) . t : : ase 
. Showing Maximum Depth of Seismic Rays as 
Function of Epicentral Distance (after 
Zoppritz) . s : ; é : : 55 
Portion of Record at Pulkowa, September 18, 
Ig10, showing microseismic movement . facing page 
Specimen Record (reduced) showing Tilt pro- 
duced by Tidal loading . j : ; 5) % 
. Earthquake in Yap, West Caroline Islands. 
Milne Seismogram, Eskdalemuir, August 
16-17, 1911. N-S Component i . following page 
. Earthquake in Yap, West Caroline Islands. 
Milne Seismogram, Eskdalemuir, August 
16-17, 1911. E-W Component ; : % 6 
Specimen Record — Wiechert Seismograph 
(1200 kg.) with ink registration . : 5 65 
Specimen Record—Galitzin Horizontal Com- 
ponent Seismograph 
Specimen Record—Galitzin Horizontal Com- 
ponent Seismograph In the pocket. 
Specimen Record—Galitzin Vertical Com- 
ponent Seismograph 
Vii 
59 
73 
73 
83 
88 
88 
