278 Mr Richard Edmonds on Earthquakes 
this phenomenon m the years 1809 and 1810, at the observa- 
tory of Paris.” 
Here is an example of so/ar periodicity in the recurrence 
of storms and great atmospherical changes, coincident with 
which, on one occasion, was an earthquake. The following 
are examples of /unar periodicities in the recurrence of storms 
and great atmospherical changes, coincident with which, on 
many occasions, were earthquakes, or extraordinary oscilla- 
tions of the sea. 
The first series of lunar periodicity begins with the 23d 
of October 1841, and consists of seven remarkable days, con- 
nected with one another by periods of four lunations each. 
The 1st, 2d, 5th, and 6th, of these days were remarkable 
for earthquakes in Scotland, Cornwall, and Guadaloupe ; the 
3d, for being the hottest day of the hottest June since 1826 ; 
the 4th, for the extraordinary maximum of the barometer ; 
and the 7th, for an eruption of Vesuvius. 
The next series of periods, of four lunations each, begins 
with the 11th of November 1842, and consists of six days ; 
on the Ist of which was an unusual depression of the baro- 
meter; on the 2d, an earthquake at Manchester; on the 3d 
and 4th, oscillations of the sea ; on the 5th and 6th, most un- 
usual disturbances of the atmosphere.* 
* Two other such remarkable days (says Mr Edmonds, ina manuscript 
note) are to be added to this series. The four lunations immediately 
succeeding the great thunder-storm of 23d June 1844, terminated on the 
18th of October, when the town of Buffalo on Lake Erie was almost de- 
stroyed by a hurricane. The maximum of the thermometer on that day 
at Chiswick was only 56°, less by 3° than it had been for several months 
before ; and the barometer there on the 16th, was at a minimum of 28.940, 
lower than it had been since the 26th of February in that year. 
The next period of four lunations expired on the 14th of February in 
the present year, when the state of the atmosphere was almost precisely 
the same at Penzance as on the 26th day of February 1844, three times 
four lunations previously. On each occasion, the weather was very 
squally with heavy showers of rain or hail, and the barometer for a day 
or two before remarkably ranging. On the 12th of February this year, 
the barometer at Penzance had risen rapidly to a maximum of 30.44, 
higher, I believe, than it had been for several months before ; and the 
thermometer at Blackheath on the same day was 33° below the freezing 
