76 REPORT OF THE CALIFORNIA EARTHQUAKE COMMISSION. 
north is weak, and the first strong maximum, at 55™ of north, is at the weakest part of 
east. The other north maxima do not correspond to any reénforcement of the east 
component. The largest earth-amplitude occurred between 135 50™ and 52™ and 
amounted, on the north component, to 3.6 mm.; on the east component, to 3.76 mm. At 
the maximum displacement of the north needle (14 02™ 45*) the earth-amplitude was 
only 1.2 mm. and at the maximum displacement of the east needle (135 54™) the earth- 
amplitude was 1.9 mm.; a half minute earlier the north earth-amplitude was 2.8 mm. 
SHIDE, ISLE OF WIGHT, ENGLAND. 
Prof. John Milne, F. R. S., director. 
Lat. 50° 41’ N.; long. 1° 17’ W.; altitude, 15 meters; distance, 77.08° or 8,569 km. ; 
chord, 7,938 km.; direction, N. 34° E. 
Foundation, disintegrated chalk over solid chalk. 
. The instruments used were: 
(1) Milne horizontal pendulum, east component. Time scale, 1 mm. to 1 minute. 
T,, 20 seconds; V, 6.1; J, 600 meters; M, 255 gm.; angular displacement, 1 mm. = 
0.36”; L, 15.6:cm. 
(2) Milne Horizontal Pendulum, east component; time scale, 4.25 mm. to 1 minute. 
Seismograms, sheet No. 12. V, 6.1; M, 255 gm.; D, 15.6 cm. 
Heavy horizontal pendulums, supported by an iron post more than 2 meters high. 
Seismograms, sheet No. 7. 
(3) North component: V, 25.4; ¢, 1.24; r,0.2mm.; M, 45 kg.; ZL, 1.030 meters. 
(4) East component: V, 8.3; ¢, 1.51; r, 0.0; M, 45 kg.; ZL, 1.030 meters. 













F NS) v 
Pagunmiranr | Pysunameane | AySvear | "Bien ” | Max. | Asrusvome 
min. min. min. min. min, mm. 
(1) East component 23.7 tae er aa 58.2 17 + 
(2) East component 24.1 34.2 49.7 ae , ae, a 
(3) North component 25.0 ve§ 51.4 56.6 58.0 to 01.5 70 + 
(4) East component Pos ee 50.7 ae 54 17 + 
m. 8. m. &. ™m, 8&8. 
Average .. . 24 16 34 12 50 36 
Interval .. . 11 48 21 44 38 08 




Duration (1) 4.4 hours; (2) 4.8 hours. The large amplitudes are probably due to 
coincidence of periods; they occur at different times for the different pendulums. 
OSAKA, JAPAN. 
Meteorological Observatory. N. Shimono, director. 
Lat. 34° 42’ N.; long. 135° 31’ E.; distance, 77.30° or 8,594 km.; chord, 7,957 km.; 
direction, N. 56° W. 
Seismograms, sheet No. 15. 
The instrument used was an Omori horizontal pendulum, east component; mechanical 
registration on smoked paper. T',, 27 seconds; V, 20; J, 3,600 meters. 



Car twawona | © ane Tmewonee | Wavias 4] -Mazcgg Aacetinecmn eo: 
m. 8. mm, 8. ™. 8. m. 8. mm, sec. 
50 19 | 44 25 
East component . 24 24 34 13 47 56 | pe Ne es 
Interval . . 11 56 21 45 35, 28 




