a at i et ite pt i il 
Date 
October 
ON 
SEISMOLOGICAL INVESTIGATION. 
203 
TABLE IT.—continved. 
Remarks 
Slight 
sy ie tors 
18 to 24, max. 23 (10) 
0 to 5 slight, and slight all day 
19 to 23 (5) 
8 to 24, max. 18 (8), at 10 (2) 
with 2m. period 
6 to 24, very slight 
14 to 21, max. 18 (5) 
18 to 19, slight 
21 to 24, ,, 
1 to 7 (3) 
7 to a max. 18 to 21 (15) 
0 to 
9 to D4, max. 12 to 20 (6) 
0 to 24, slight 
4 to 5, two groups of 10 waves 
each (1) 
8 to 10, 34 waves per hour 
13 to 24, max. 21 (5) 
0 to3 
4 to 5, two groups of 9 waves 
each 
10 to 24, max. 20 (5) 
0to8 
4 to 6, groups of slight regular 
waves 
8 to 24, 20 (5) 
0 to 1l 
12 to 20 (2) 
20 to 24 (15) 
Heavy tremors (10 to 15) 
Heavy tremors (10 to 15) 
” ” 
11 to 22 (1) 
22 (5) 
22 to 24, slight 
0 to 9, F 
1 to 2, irregular and slow 
10 to 22 (1) 
5 to 24, max. 14 to 24 (5) 
0 to6 
6 to7 
Rain at night. 
Period 3m. 
Period is shorter. 
15m. at end of storm, 
“4m. 
Period reaches 5 
Sudden increase from 2 mm. to 7 mm. 
in tremors after opening case at 
7.45 P.M. 
Period lm 25s. to 2m. 50s. 
Tremors die down. 
Period at 9h. about 2m. 50s., but de- 
creases at end of storm. Cold at 
night. 
Max. of 2°5mm. after opening case at 
21. Dies out as regular pulsations 
of ‘6mm. and period Im. 25s. 
These are good examples of pulsations. 
The latter has 34 waves. Period 
Im. 24s. to 2m.7s. Max. range 2mm. 
Die out. 
Commence as pulsations. 
Slight. 
Increase after opening case at 20. 
Reach 15mm. when the pendulum is 
deflected and they stop suddenly. 
These large tremors commence after 
opening box. 
No CaCl, in box. 
Box painted inside, and face and top 
of column covered with cement. ° 
These continue even with doors of case 
open. 
Completely covered inside of case with 
thick felt and tremors cease. 
9h., door slightly opened; closed it at 
7h. on the 11th. On the 10th it was 
very stormy all day and no tremors. 
Period 56m. 
Become mar} ed after closing door at 
7 p.M. Period 2°8m., but this is 
shorter at end of storm. 
Storm dies out. 
A calm day. 
