218 
REYNOLDS: ERUPTION OF KRAKATOA. 
east. It was felt at Valentia between 1.27 and 2.10 p.m.; at Stony- 
hurst from 1.48 to 2.33 p.m., and at Aberdeen from 1.53 to 2.30 p.m. 
It very plainly indicated on the Leeds curve as occurring from be- 
tween, 2.0 or shortly before, and 2.30 p.m.; the amplitude of the 
oscillation was about '03 to '04 inch. The Aberdeen, Stonyhurst, 
Glasgow, Armagh, and Valentia curves further indicate a disturb- 
ance travelling from east to west between 2.45 and 3.45 p.m. It 
was well marked at Stonyhurst, the gi-eatest depression occurring at 
about 3.15. The time and shape of the deflection are exactly repro- 
duced on the Leeds tracing. 
Many years ago Humboldt showed that it was possible to tell 
the hour of the day at the equator, with a certain approach to accuracy, 
from the height of the barometer, owing to the comparatively wide 
range of its diurnal variation within the tropics. This fact, however, 
pales into insignificance when compared to that of determining the 
the time of a volcanic outburst, thousands of miles away, from the 
rhythmic succession of a few minute depressions in a barometric 
tracing." 
1884. 
THE EAST ANGLIAN EARTHQUAKE, APRIL 22ND, 1884. 
" Soon after Nine on the morning of Tuesday, April 22nd, 1884, 
the eastern parts of this country were shaken by a seismic disturbance, 
which, although happily unattended by loss of life, for destructiveness 
and wide distribution has been without a parallel in Britain for at 
at least four centuries." 
The report of this earthquake has been published as a separate 
volume by the Essex Field Club (pp. 223), being edited by Professor 
Meldola, F.I.C., F.R.A.S., &c. (Macmillan & Co.) 
The report concludes by the following notice of the influence 
upon the recording barometer, at Leeds. 
" While the foregoing report has been going through the press, 
we have learnt, through a communication to the " Leeds Mercury ", 
that the shock recorded itself in that town on the tracing-paper of a 
recording barometer, although, as far as we have been able to ascer- 
tain, the movement itself was not perceived by anyone. The following 
is the communication in question : — 
