ON SEISMOLOGICAL INVESTIGATIONS. 19 
—— | = | Vol. | Year | Page 
Origins for the Earthquakes of 1899 . | — | — | 1900 | | 80 
Origins of Earthquakes (Foster) : | E. 8. | XV. | = 
» Of Earthquakes recorded in 1899, — — | 1902 61 
1900, and 1901 | | | | 
Oscillographs, Double (Bertin). . Wd bakse XY. ; — | — 
Overturning and Fracturing of Brick and| — | — 1891 | 126 
other Columns 
Ditto Sih 6 Mpegs off pee al bie eee — | 1892 | 113 
Ditto Gucavivatcae cre? «| — 1893 | 226 
P | | 
Paths followed by Earthquake Motion, Hypo- | — | _— ; 1895 | 173 
theses of Hopkins, Seebach, Schmidt | 
Pendulum, Astatic (Gray) cage oke) Relies: II. po (Ge Ee 
»  withaSingle Bob (Ewing) Talat ste iust Sesh VI. ; — | — 
* Duplex (Sekiya) | SIDSe VII. _—- |), 
Periodicity in Earthquake Frequency, New| — | — 1912 | 95 
(H. H. Turner) | 
Perrey’s Catalogues, Discussion of (Mallet) . — — | 1858.) 4 
Perrey’s Memoirs, A List of (Mallet) Sa) esta tye — | 1858 | 122 
Perry Tromometer(Prof.J. Perry) . . . — — | 1896 | 218 
% : * ae eel ee == abahaleo tee 
Peru and N. Chile Earthquakes (H. Hope- | — _ 1911 | 45 
Jones) | | 
Peruvian Earthquake, May 9,1877. . i dtoish Il. | — — 
Phenomena and Theories of Volcanoes (Hop- = — | 1847 | 33 
kins) | 
He Connected with Earthquake Pro- | T. 8. TTT: /—- 
pagation (Hoefer) 
Demanding Solution . . .|T.S. XII. |; — — 
Philippine Islands Earthquakes, 1881 . . | T.S. | IV. ; — | — 
Photograms obtained with Seismometer | — ~- | 1898 | 272 
(Plummer) 
Photographic Record Receivers. g |) == — | 1907 | 85 
Photography applied to Seismology (Burton) . isbn ile | — | — 
Piers, Experiments on . . A — — | 1901 | 43 
Pit, 18 ft. deep, observations . = — 1891 | 24 
Point, Experiments on Direction of ‘Motion of — = — 1884 | 244 
Preliminary Tremors, Duration of . / — 1902 64 
Preliminary Tremors, Duration of (R. D. [ — — 1907 | 93 
Oldham) 
Publication of a Seismological Journal. . | — — 1893 | 226 
| 
Q. 
Quick Vibrators as Applied to Seismometry . | — | — 1909 | 55 
; R. | 
Rainand Earthquakes . . . . «| — | — 1900 | 106 
— — 1850 72 
Rate of Wave Transit in the Killiney Bay — = 1851 | 273 
Sand (Mallet) 
Recent Earthquakes (Ewing) . Mush Ii. — | — 
Records obtained from Three Horizontal Pen |; — — 1902 | 68 
dulums at Shide | | 
Ditto . . B ° “ . A . el — 1903 | 81 
Ditto... . — — 1904 | 42 | 
Records obtained from Two Similar Seismo- | — _ 1901 | 51 
graphs at Kew (Dr. Chree) \ 
