206 
PROFESSOR KEELY’S MAGNETICAL OBSERVATIONS. 
Remarks on Table II. 
1. This station was on the east side of Citadel Hill, in an enclosure surrounded 
with a picket fence, and as much as forty or fifty rods from the N.E. outer line of the 
works. There were no iron stores in the works, and only two or three guns mounted, 
which were on the S.W. side. To ascertain if there was local attraction, I took the 
dip again in the plain on the west side of the hill, at least 100 rods from the works, 
and found it did not vary by one minute. 
2. On the hill, back of Hiltz’s Tavern, half-way from Halifax to Windsor. 
3. M'^Bride’s Garden, one-fifth of a mile N. of the Catholic Chapel. 
4. Garden, back of Terrey’s Hotel. 
5. Forty rods S.E. of Quirk’s Tavern. 
6. An open field back of Hall’s Tavern, and about forty rods S. of Catholic Chapel. 
7. On the sea-side E. of the Barracks. 
8. River-side in front of the Province House. 
9. In an open field, a few rods, say thirty, N. of the Woodstock Hotel. On exami- 
ning my notes at home, I found that a somewhat thick pencil -mark, in noting the 
azimuths for meridian, had caused the observations for ^ and von the 4th to be made 
just 10° out of it: calling those angles 6' and v', & was reduced to the meridian by 
the formula cot ^=cot & — cos 10°; I then obtained the value from & and v', as if 
• SlH ^ 
rightly observed; and then obtained <p from the equation which, I believe, 
will be found a correct process. 
10. In the road near Woolverton’s. 
1 1 . Near the Barracks ; needles unsteady on the 7th. 
12. On the lower cape, at the junction with the St.John. Observations with L(l) 
disturbed. 
13. On the lower cape, at the junction of the Madawaska with the St. John. 
In regard to the latitudes and longitudes, I am indebted to Major Graham for 
those of Nos. 9, 10, 11, 12 and 13. Messrs. Crauford and Agnew, chronometer 
raters at Halifax and St. John respectively, furnished me with those for Nos. 1 and 7 ; 
the rest were obtained from the best authorities of books or maps that I could pro- 
cure. 
Table III. exhibits the change in force of needles L(l) and L(2) ; the results 
are reduced to a temperature of 50°. 
Table III. 
1847. 
No. of 
observations. 
Ip for L(l). 
Difference. 
1847. 
No. of 
observations. 
p for L(2). 
Difference. 
February 13. 
22 
•8718039 
•0010902 
•0000015 
February 23. 
21 
•9140079 
•0069450 
•0002127 
June 17- 
10 
•8707137 
June 30. 
10 
•9070629 
August... 16. 
5 
•8707122 
August...! 6. 
5 
•9068502 
