32 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



in all directions. No very violent vibrations — /. c, sharp, quick. 

 House rocked uncomfortably, accompanied by some noises. Time 

 of beginning probably' 2 seconds late. E.-F. VI or VII. No wind. 

 — C. D. Perrine. 



1903. June 11; Lick Observatory. About 9:55 p. m., ,hine 10, preceding 

 the earthquake shock by 7 hours and 20 minutes, the mercury was 

 so disturbed that for an interval of more than one minute ab- 

 solutely no images were visible. At the time, this was attributed 

 to some freak of the wind, which was, however, quite moderate 

 and steady. Ordinarily little trouble is experienced from wind, 

 even when violent, and then only for brief intervals. This dis- 

 turbance was a continuous quiver which rendered all reflections 

 impossible. Tremors previously noted as connected with earth- 

 quake shocks were usually of the nature of vibrations or oscilla- 

 tions.— Prof. E. H. Tucker. 



Very severe quake. Good records on both instruments, but the 

 Ewing clock did not start. The record of the clock beats was 

 accordingly impressed later. The general direction of vibration 

 was northeast and southwest, with a strong vortical component. 

 There is evidence of gyratory motion Vt^hich is clearly shown in 

 the duplex record. The maximum oscillation of the earth's sur- 

 face was 1/5", E.-F. VI or VII.— Prof. E. H. Curtiss. 



Berkeley; 5:12 a. m. Severe shock. 



1903. June 20; Berkeley; 1:10 a. m. (date probably wrong; possibly June 

 21. a. m). 



1903. June 21; San Francisco. 



Oakland, Chabot OVjservatory; 1:20 a. m.; duration, 10 seconds; di- 

 rection, east to west; intensity II. 



Napa; 1:30 a. m. — W. H. Martin. 



1903. June 26; Campo, Cuyamaea, San .Tacinto. 



1903. June 29; Cuyamaea. 



1903. July 2; Campo. Cuyamaea. 



1903. July 12; Campo. 



1903. July 13; HoUister. Campo. 



1903. July 24; Chico. Colusa, Grass Valley, Greenville, La Porte, Marys- 

 ville, Meadow Valley, Nevada City, Orland, Oroville, Palermo, 

 Sacramento, Tehama, Wheatland, Willows. 



(Willows. A severe shock of earthquake at 12:26 p. m. on the 

 24th; began with a rumbling noise, succeeded by a twister. 

 Several brick walls cracked and plaster fell from many buildings. 



