Lovering on Magnetic Observations at Cambridge. 153 
toiling in the various fields of meteorology, although we ourselves 
may not live to reap it. 
The following Table is compiled from pages 52-3 of my for- 
mer communication, and pages 139-40 of the present one. In 
a parallel column by the side of the Cambridge record, I have 
placed an abstract from the Toronto Meteorological Journal for 
the same date, that it may appear how often the appearance of 
the Aurora is simultaneous at both stations, and how often the 
failure is explained by the sky being overcast at Toronto. I have 
not given the precise hour and minute when the several phases 
of the Aurora were seen at the two places. In some cases, the 
coincidence of time is striking; in other instances, the dates 
assigned to the phenomena differ by several hours. I content 
myself with pointing out the general agreement as to the nights 
when the phenomena are witnessed, referring, for minuter com- 
parisons, to my own paper and the volume of Col. Sabine. It 
seems, that on some of the days when the Aurora was seen at 
Cambridge, no entry of any kind is made in the Toronto journal. 
This fact, from which we infer fair weather at that place, is indi- 
cated by a straight mark in the line corresponding to those days. 
1840. CAMBRIDGE. Toronto. 
April 24-5. Slight Aurora. 
May 28-9. Remarkable Aurora. Cloudy. 
May 29-30. Brilliant Aurora. Brilliant Aurora. 
June 26-7. Aurora. Cloudy. 
July 4-5. Aurora. 
July 29-30. Aurora. 
August 19-20. Aurora. Aurora. 
August 28-9. Fine Aurora. Fine Aurora. 
October 22-3. Aurora. Aurora. 
November 30-1. Aurora, Probably overcast. 
1841. 
November 18-19. Beautiful Aurora. Brilliant Aurora. 
December 24-5. Aurora. Overcast. 
1842. 
January 4-5. Aurora. Overcast. 
January 5-6. Aurora, 
January 7-8. Aurora. Overcast. 
January 9-10. Aurora. Overcast. 
January 15-16. Aurora, Aurora. 
February 11-12. Aurora. Overcast. 
August 8-9. Aurora. 7-8 cloudy. 
29 
