2S0 
MAGNETIC SURVEY IN NORTH AMERICA. 
Table XVIII. — Observations on the Magnetic Force with Lloyd’s Needle L. A., from 
St. Helen’s (in Canada) to Fort William, in April and May 1843. 
Station. 
1843. 
Angles of 
Temp. 
Inclination. 
Intensity. 
Remarks. 
deflection. 
Toronto = 1*836. 
Fort William ^ 
May 29« 
- 9 377 
— 9 41-1 
O 
70 
56 
O / 
Mean. . 
- 9 39-4 
63 
78 10 
1*8655 
Base station. 
St. Helen’s 
April 25. 
-15 06-1 
60 
77 05-5 
1*826 
Isle d’Urval 
30. 
-16 26-9 
45 
77 21-1 
1*817 
La Combes 
May 2. 
-14 35-6 
49 
76 50*6 
1*829 
P te aux Chenes 
3. 
-17 10-0 
49 
76 55-4 
1*810 
Point Aylmer 
5. 
— 15 05-8 
52 
76 41-0 
1*825 
Fort Coulange 
8. 
-12 13-8 
53 
77 29-7 
1*847 
Deux Joachims Portage. . 
10. 
— 14 04-9 
70 
77 03-8 
1*834 
• 
Trou Portage 
11. 
— 13 24-5 
87 
77 24-4 
1*840 
Little River 
12. 
-13 12-6 
69 
77 28-5 
1*841 
L. du Grand Vase 
13. 
-12 05-2 
86 
77 21-7 
1*849 
Lake Nipissing ........ 
14. 
-13 48-0 
64 
77 09-5 
1*836 
Ricolet Falls 
15. 
- 9 15-7 
60 
76 45*4 
1*870 
P te au Croix 
16- 
-11 41-0 
50 
76 31-3 
1*852 
Lake Huron 
17- 
-12 57*3 
51 
77 05*6 
1*843 
Snake Island ; 
18* 
— 13 41*2 
68 
77 05*5 
1*837 
Tessalon Point 
19- 
— 12 42-3 
52 
76 59*3 
1*844 
Pointe aux Pins 
20- 
— 11 02-4 
70 
77 13*4 
1*858 
Pointe au Crepe 
21* 
— 12 47-4 
63 
77 11*5 
1*844 
Michipicoton 
23- 
-10 26-4 
46 
78 06*3 
1*859 
Otter Island 
24- 
-18 20-8 
51 
79 43*6 
1*812 
Pic Fort 
25* 
— 11 46-6 
58 
78 45*8 
1*851 
Terreplatte 
27- 
-11 02-6 
48 
78 53*6 
1*855 
Pointe Tonnerre 
28- 
-10 02*7 
55 
78 23*2 
1*862 
Table XIX. — Observations on the Magnetic Force with Lloyd’s Needle L. A., between 
Fort William and Rat Portage (where the needle met with an accident) in the 
months of May and June 1843. 
Station. 
1843. 
Angles of 
Tempe- 
Inclination. 
Intensity. 
Remarks. 
deflection. 
rature. 
Toronto = 1'836. 
Fort William | 
May 29. 
29. 
-17 09*6 
-17 09*9 
O 
53 
53 
o / 
Mean . . 
-17 09*75 
53 
78 10 
1*8655 
Base station. 
Portage Ecarte 
June 2. 
— 18 38*2 
52 
77 13*5 
1*852 
Chien Portage 
3. 
-17 41*4 
47 
78 26*8 
1*863 
Prairie Portage 
5. 
— 18 34*4 
53 
78 26*2 
1*857 
Savannah Portage 
6. 
-16 52*4 
60 
78 21*8 
1*869 
French Portage 
8. 
— 18 01*6 
60 
78 20*4 
1*860 
Portage des deux Rivieres. . 
9. 
— 17 41*8 
58 
77 49*4 
1*861 
Lac a la Crosse 
10. 
-17 41*9 
58 
77 51*0 
1*861 
2 d Portage from the Lake . . 
11. 
-18 27*5 
72 
77 40*1 
1*855 
Sturgeon Lake 
12. 
— 18 08*2 
66 
77 44*8 
1*857 
Lac la Pluie 
13. 
-18 12*5 
60 
77 47*9 
1*857 
Fort Francis 
14. 
-17 48*3 
63 
77 28*0 
1*859 
Rainy River 
16. 
— 11 20*6 
66 
77 57*4 
1*906 
Lake of the Woods 
17. 
— 17 27*2 
65 
78 03*7 
1*863 
Lake of the Woods 
18. 
— 19 51*6 
79 
78 16*7 
1*847 
