70 REPORT—1850. 
Alps, the barometer fell 6 lines immediately after the shock, and in the 
evening of the same day rose again 4 lines. 
1834, 15th October.—During the earthquake in Hungary the barometer 
fell 1 inch, as also in Vienna. 
On the other hand, in the following examples the mercury had a high po- 
sition or ascended :— 
1683, 28th September.— During the earthquake at Oxford. 
1822, 19th February.——During that in Savoy. 
1825, 23rd December.—At Strasburg. 
1828, 2nd February.—A¢ the time of the very violent earthquake in Ischia. — 
1830, 23rd September.—In the Swabian Alps, the barometer reaclied its 
lowest position in this month, 6 lines below the average. From the 
29nd to the 23rd (the day of the earthquake, and consequently before 
the shock), it suddenly rose 4 lines, and on the following day fell slowly. 
1834, 2nd February.—In Silesia. 
In the following instances the barometer remained perfectly quiet :— 
1826, 26th March.— At Kremsmiinster. 
1829, 26th November.—During the widely-extended earthquake in Transyl- 
vania and Russia. 
1829, 30th November.—At Innspruck. 
1834, 22nd March.—In Mexico. 
1835, 20th February.—-During the extremely violent earthquake in Chili. 
1836, 9th May.—In Dalmatia. 
Here therefore we find twelve instances in which, on the occurrence of 
earthquakes, the barometer did not fall, against nine cases in which it did. 
The number of these examples is doubtless very small as contrasted with 
that of the earthquakes which occurred in the period of time from which 
they are selected; but they are the only ones which we have found in that 
period, since in the accounts of the numerous remaining ones, nothing is 
noticed with respect to the position of the barometer before; during, or after 
the earthquake. Here also they are very much divided, and in this respect 
ean prove nothing, or at least can only confirm the fact, that, as already 
mentioned, no more sufficient foundation as yet exists upon which to base a 
law with respect to the behaviour of the barometer during earthquakes. 
This is also proved by a very instructive comparative view of the position of 
the barometer in fifty-seven earthquakes which have been observed at Pa- 
lermo from 1792 to 1831, which we owe to Frederick Hoffman (Poggen- 
dorff’s Annal. Physik und Chimie, bd. xxiv. (100), s. 49-64), whom we 
have already had occasion to make honourable mention of. 
4th. The Thermometer. 
I can find few observations of this recorded. Those of the New Zealand 
earthquake show no remarkable fluctuations of temperature either before or 
during the earthquake. The range during the days from the 7th to the 
15th of October, before the earthquake, was from 42° to 52° morning, and 
48° to 62° night; and during the remainder of the same month of continual 
earthquake, its range was from 45° to 62° morning, and 48° to 66° at night ; 
while for the eighteen first days of November, the range in the morning was 
from 48° to 64°, and in the evening from 56° to 73°. (West. Rev. July 
1848.) 
During the earthquake which took place in Piedmont in the year 1808, 
the thermometer experienced a slight fall on the occurrence of each shock. 
Von Hoff remarks, “Observations have as yet failed to lead us to any 
rule, as to whether changes in the degree of warmth of the atmosphere 
alas. on 
