52 Lovering and Bond on Magnetic Observations at Cambridge. 
noticed at the Cambridge Observatory; some of the most re- 
markable presented themselves at times when the regular obser- 
vations on the Declination Magnetometer were in progress; and 
pains have been taken whenever it was practicable to watch the 
instrument on all other occasions when the heavens gave signs of 
preparation for such an exhibition. Annexed is a list of those which 
were displayed on a grand scale. 
April 24-5. Slight Aurora. 
May 28-9. Remarkable Aurora. An arch was formed, at 2" 39’, 
A. M. Gott. M. T., running as nearly as could be ascertained at 
right angles to the magnetic meridian. A crown began to form at 
4" 24’, Its position was referred to « Cor. Borealis which was 
then on the meridian. As it was nearly at the same altitude of 74° 
52’ and to the west of the meridian, it could not have been far 
from the magnetic Pole. Shortly after this the arch was broken up 
and the northern sky covered with pulsations of light. 
May 29-30. Brilliant Aurora. The auroral arch was first seen 
at 2" 32’ A. M. Gott. M. T., extending from a point nearly east to 
within a few degrees of the western horizon. The light was in- 
tense. ‘The apex of the arch was situated 20° at first, and at 2° 
42',30° south of the zenith. After this time, the light became 
broken and scattered, flying from east to west. ‘This arch was 
entirely detached from the main body of the Aurora and resembled 
a streamer. In the north there was a diffused light but very bright ; 
and swift flashes towards the zenith. At 3°59’ a large meteor 
was seen in the north, 20° high, descending towards the northwest. 
June 26-7. About 2°36’ A. M. Gott. M. T., an Aurora was 
seen at the North, of a white diffused light. At 6° 20’, the Aurora 
assumed a dull appearance, with dark wane intermixed. At 7" A. 
M., the Aurora became more active, and some streamers were seen. 
The needle was slightly affected at this time. 
