438 
APPENDIX NO. XVII. 
Owing to the excessive cold and the difficulties of warming our 
observatory, it was not uncommon to have a temperature of 30° below 
zero at our feet, while other portions of the room ranged from — f-90° 
to —20°. Under these circumstances the task of observing was one 
~of no common hardship. 
It was not until the close of the winter that I was able to take my 
share in the preceding or the term-day observations; and I desire to 
express my obligations to Dr. Hayes and Mr. Bonsall, as well as to 
George Stephenson, for their zealous and intelligent co-operation with 
Mr. Sontag and myself. E. K. K. 
No. xvn. 
Magnetic Term-day Observations. 
These observations were made at the following dates:— 
1854, January 18-19, 
February 24-25, 
March 22-23, 
April 19-20, 
May 26-27, 
June 21-22, 
commencing at 5 p.M. local time, or 10 P.M. Gottingen time, and 
continued for twenty-four hours. The scale reading 280 corresponds 
to 108° 3' west declination, and increasing scale readings denote a 
smaller westerly deviation. The value of one division equals 0*79': 
The readings are in scale divisions. 
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