REYNOLDS: ERUPTION OF KRAKATOA. 
215 
influence of the Krakatoa Eruption, in the Straits of Sunda, upon 
barometrical records in Europe, including observations in Leeds. 
" The last issue of the Proceedings of the Royal Society contains 
a remarkable paper, by Mr. R. H. Scott, F.R.S., the Secretary of the 
Meteorological Council, on a series of barometrical disturbances which 
passed over Europe between the 27th and the 31st August, 1883." 
" It appears that when the barograms obtained from some six- 
teen observatories situated in various parts of Europe, from St. Peters- 
burg in the east, to Valentia off the Irish coast, in the west, are 
compared together, the curves extending from about noon on the 27tli 
to the end of the month are seen to exhibit a series of remarkably 
sadden depressions and quick recoveries of pressure. These disturb- 
ances were not actually synchronous at the various observatories. At 
about 11 a.m. (Greenwich time) on the 27th there was a sudden in- 
crease of pressure, followed by a decrease, at St. Petersburg ; similar 
phenomena were noticed, but not precisely at the same time, at Brussels, 
Paris, Kew, Aberdeen, Liverpool, Armagh, Coimbra, and Valentia, 
besides a number of intermediate stations. The movement at about 
this time was in fact being propagated from east to west at a very 
great velocity ; the recovery from the first decrease occurred at St. 
Petersburg at noon, and at Valentia Island at 2.25 p.m. that is, the 
movement occupied two hours twenty-five minutes travelling the 
distance of 1,315 miles between the two stations." 
" On the 28th a similar disturbance was propagated from west to 
east; it was at Valentia at 3.20 a.m., and at St. Petersburg at 5.15 
a.m., the passage occupying one hour and fifty-five minutes. 
"On the 29th a return wave reached St. Petersburg at 0 hour 20 
min. a.m., and Valentia at 2 hours 38 min. a.m. Interval, 2 hours 
8 min." 
"On the afternoon of the 29th a disturbance from west to east 
occurred at Valentia at 2 hours 0 min. p.m., and reached St. Peters- 
burg at 3 hours 35 min. p.m., thus traversing the distance in 1 hour 
35 min. The disturbances became gradually feebler in intensity, 
and at the end of the month were no longer to be recognised." 
"On the 27th of August occurred the violent volcanic outburst 
in the Straits of Sunda, by which in the course of a few hours the 
