30 
31 
Feb. 22. 
= 
» 
ge 
to 
we ae 
M.M.A.T. 
H. M. 
20 56 
20 46 
4 0 
14 50 
18 23 
M231 
3 28 
11 12 
15 42 
7 38 
12, 19 
22 43 
18 18 
14 5 
19 50 
1s 49 
8 45 
4 27 
7 45 
9 4 
9 54 
Oa 
Bbp rae 
17 ; 22 
18 49 
17 28 
REPORT—1899. 
Minute oscillations occur throughout for about 13 hours 
preceding this given time. The most.conspicuous of these 
small and irregular oscillations occurs at 11h. 35m., 
period 28m., amp. 3’. 
Very minute oscillations commence at 18h. 25m., continued 
till 22h., amp. under 2’. 
No disturbance preceding. The curves commence to be 
disturbed at 7h. 30m.; oscillations at first very small, 
but greatly increasing after 11h. 30m., considerably dis- 
turbed for more than 30 hours after. 
No disturbance whatever. 
Very slight disturbance commencing 15h. 20m., consists of 
a small wave, period 5m., amp. 13’, followed by other 
very minute waves, amp. under 1’, 
Decided disturbance commenced at 7h. 0m., consisting of a 
large oscillation, period from 7h. Om. to 8h. 27m., amp. 
73', with some minute waves superimposed, 
Very slight disturbance at 2h. 15m., showing a small 
oscillation, period 15m., amp. 13’, followed by a few 
almost inappreciable waves, amp. only a few seconds of 
arc. 
No disturbance. 
Disturbance commencing 8h. 30m. consisting of two con- 
secutive waves, period about 25m., amp. 4’, followed by 
afew very minute oscillations. 
No disturbance. 
Disturbance commencing 12h. 19m., ending 15h. 10m., con- 
sisting of a sudden small oscillation amp. under 2’, followed 
by four waves, period 45m., amp. 3’. 
Small oscillation at 22h. 25m., period 10m., amp. under 2’, 
Very slight disturbance, commencing at 17h, 15m., amp. of 
oscillation about 2’, period one hour. 
No disturbance. 
Curve for this day slightly disturbed throughout its length. 
No particular disturbance shown for some hours before or 
after the given time. 
Curve for this day slightly disturbed throughout its length. 
No particular disturbance shown for some hours before or 
after the given time. 
No disturbance. 
Very slight disturbance (if it can be so called) at 3h. 45m., 
consisting of a small oscillation, period 20m., amp. about 
1’. This curve shows oscillations of this kind throughout 
at irregular intervals. Probably this should not be called 
a disturbance. 
Minute oscillations throughout the curve. No special dis- 
turbance showing. 
No disturbance. 
No disturbance. 
Disturbance very slight at 18h. 15m., consisting of a small 
wave, period 30m., amp. under 2’. 
Very minute disturbance at 16h. 55m., consisting of a small 
wave or oscillation, period 9m., amp. under 2’. 
This curve is very much disturbed throughout; but it shows 
two very conspicuous and larger disturbances, viz. :—One 
from 8h. 20m. to 9h. 50m. with amp. of 17’, and another 
with amp. of 11’, at from 10h. 5m. to 10h. 40m. 
Minute disturbance commencing at 19h. 55m., consisting 
of a series of minute waves, max. amp. 14’. 
Disturbance commencing at 5h. 10m. and continuing till 
17h., but gradually decreasing in amp. from 53’ to 
nothing. 
