







DAILY OBSERVATIONS OF MAGNETOMETERS DURING Marci AND APRIL, 1850. 
Decln. 
"|| 24° 4 
37-19 
36:85 
39-01 
40:36 
38-74 
38-06 
37°53 
51-32 
42-98 
35-64 
38:47 
48-83 
38-20 
35-44 
37-46 
37-19 
37-66 
36-38 
37-32 
36-32 
39-27 
36-45 
39:37 
34-84 
35-58 
36-65 
36-52 
38-00 
36-38 
35-98 
35-84 
34-90 
35-84 
35-44 
33-04 
36-92 
35-37 
34-90 
37°53 
35-78 
34-70 
33-89 
36-99 
32-21 
35:04 
32-68 
35-02 
35-44 
35:78 
34-70 
37-53 

34-90 
8 A.M. 
Bifil. 
Cor- 
rected. 
Balce. 
Cor- 
rected. 


mic. div 
103-4 
98-4 
se. div. 
590-0 
579-5 
95.0) 
99-5 
106-2) 
104.7 
106-7 
106-2 
584-3 
564-8 
588-8 
589-1 
986:3 
090-8 
583-4 
582-6 
583-0 
574-7) 90-3 
586-4; 97-9 
594-6) 97-7 
99-9 
110-5 
105-3 

587-5] 108-3 
590-6) 100-3 
592-8) 97-6 
590-0} 98-0 
592.9} 104-4 
591-0} 103-8 
587-5 
078:8 
583°3 
579-9 
590-4 
590-0 
72:5 
108-1 
99-0 
101-9 
103-9 
108-0 
580-2 
588-7 
581-4 
588-5 
590-3). 
588-9 
580-2 
578-9 
580-9 
580-6 
589-4 
591-3 
593-8 
587-6 
588-5 
586-5 
592.7 
589-7 

585-3 
586-7 
583-8 
588-2 
589-3 
594-2 
582-7 



age 101-7 
41-43 
43-85 
41-63 
39-68 
39-21 
39-81 
38-67 
39-68 
37-73 
38-06 
40-76 
42.98 
40-36 
41-30 
38-80 
39-81 
39-88 
91-3) 39.54 
43-11 
40-76 
11 a.M. 
Bifil. | Balce. 
Cor- | Cor- 
rected.|rected. 


se. div. 
570-0 
565-4 
mic. div 
103-0 
106-7 
576-9 
562-4 
567-5 
574-3 
569-4 
573-0 
92-4 
103-8 
561-4 
562-4 
556-8 
571-6 
574-3 
572-2 
589-1 
573-1 
575-1 
575.4 
574-9 
576:8 

554-4 
561-8 
568-8 
563-8 
564-7 
566-0 
561-1 
568-2 
573-7 
575-7 
572-4 
577-4 
567-5 
568-2 
580-6 
567-6 
560-4 
567-9 

565-8 
564-6 
568-9 
569-0 
572-8 
569-2 

571-2 
566-1 
569-9 
577-2 
073-4 
a79:-3 





579-1 
5753 
Decln. 
24°+ 

53-61 
47-42 
51-05 
48-90 
49-77 
50:25 
49.30 
52:06 
55-15 
46-34 
50:85 
49-57 


50-58 
52-33 
48-70 
48-36 
47-69 
50-25 
51-52 
50-38 
52-60 
48-97 
53-88 
50-78 
48-43 
47-42 
52:40 
51-93 
51-12 
47-62 
47-29 
49.24 
50-31 
+2)| 48-43 
49-10 


44-83 
61-25 
51-93 
51-99 
51-86 
50-25 
49-10 
50-51 
|| 49-91 
46-82 
50:78 
48-23 
-6| 48-97 
.9| 47-96 
5 | 40-49 

2. P.M. 
Bifil. 
or- 
rected. 
se. div. 
585-2 
976-9 
573-5 
577-8 
582-7 
577-7 
573-0 
585:5 
581-8 
576-7 
579:3 
570-6 
580-2 
582-9 
579-1 
587-8 
589°-5 
579-2 
585-2 
584-9 
566-6 
587-5 
580-9 
576-9 
584-0 
580-7 
568-2 
581-7 
584-4 
581-2 
586-2 
593-3 
570-0 
580:3 
573-4 
582-9 
576-0 
580-7 
578-1 
578-4 
580-5 
582-5 
590-2 
579-8 
581-5 
580-0 
583-3 
577-2 
580-0 
092-0 
589-4 


582-6 
5 P.M. 
15 

Temperature of Bifilar and 























Balance. 
Balce. || Deein,| Bifil. | Balce. 
Cor- 24° 4. Cor- | Cor- || 8 A.M. | 11 4.M.] 2 P.M. | 5 P.M, 
rected. rected./rected, 
mic. div fi se. div.|mic. div & 2 2 £ 
104-3}| 49-44] 604-7) 133-7]| 45-3 45-5 46:8 48-7 
105-7|| 42-58) 585-5/ 114-8] 47-9 | 47-8 | 48-1 48-7 
100-5|| 48-23] 578-5) 143-9] 41-1 40:0 | 40-3 | 41-5 
103-3] 43-32) 568-8) 112-6]| 39-6 40-0 41-1 42.5 
98-2)| 44:59) 589-2) 107-7|| 45-7 46-7 48:8 50-8 
98-8|| 46-08] 588-7) 103-0|| 49-4 | 49-3 | 50-6 | 52.5 
98-6|| 45-00) 589-4) 103-9] 48-6 48-0 49-5 53-0 
99-3] 49-24| 583-8) 121-0] 49-2 | 48-3 | 47-9 | 48-0 
115-5|| 50-78] 602-2) 140-4|| 42-4 | 41-7 | 43-1 45-4 
115-0|| 49-03) 589-0] 135-9] 40-8 | 40-0 | 41.3 | 44.7 
108-8|| 44-26] 576-3] 131-7|/| 42-0 | 41-5 | 43-7 | 46-6 
101-0|| 44-19) 586-1) 104-2) 46-6 | 46-5 | 46.9 | 47-8 
97-9|| 45-00] 588-9] 114-4) 45-6 45-3 46-4 48-3 
98-2|| 49-24) 600-7} 112-8) 46:5 | 46-4 | 46.7 | 47-3 
104-3)| 43-52| 589-3) 104-4|| 38-8 | 38-6 | 39-6 | 41-8 
87-6|| 44-32) 594-0] 100.8] 43-2 43-6 44.9 46-5 
86-2)| 43-05] 595-8] 98.3) 44:9 44-8 46-0 47-8 
94-3] 40-56) 589-2) 109-0)) 44-3 | 43-9 | 44.2 | 44.7 
96-5|| 45-00) 593-7] 102-0)| 42-6 42-8 43-4 43-0 
92-3)| 46-08] 592-5] 105-9]| 41-3 39-9 40-2 41-0 
122-1]| 44-12) 576-7| 106-7] 31-0 | 30-7 | 32-8 | 36-5 
108-8)| 44-19} 593-2) 118-8|| 35-6 35-7 37-9 41-1 
101-4)| 42-84} 609-5} 115-5|) 37-3 36-9 38-0 39-8 
105-4)| 45-27) 593-6} 96.6|| 34-0 33-4 35-7 40-5 
87-3]| 47-22) 598-1) 112-6)| 35-5 35:3 | 37-6 | 40-8 
86-6|| 45-40} 595-0} 96-2)) 38-8 | 38-7 | 39.3.) 40-2 
105-2|| 46-88] 601-0) 152-8)) 43.7 | 44-8 | 47-0 | 48-5 
80-8)| 44-86) 598-9) 94-9) 47-0 | 46-7 | 47-3 | 48.7 
88.4|| 44-26] 594-1} 96-7)| 48:6 | 49-0 50-0 | 51-3 
70-4|| 42-91] 590-7) 95-0]| 50-0 50-5 52-1 52-6 
80-5|| 43-72) 597-0} 83-3)} 51-5 51-5 52:3 54-2 
88-6|| 43-92) 605-7; 100-8| 48-5 | 46-9 | 48-1 48-8 
101-5] 34-90] 625-1] 139-1} 49-6 | 50-2 | 52.2 | 53.9 
86-4|| 44-53] 591-1) 84-5|)| 50-9 | 50-9 | 51-8 | 52-3 
113-8|| 43-25] 599-7| 108-5|| 49.2 49-0 49-7 51-0 
80-1|| 44-53] 605-4) 105-4)) 43-8 | 42-7 | 45.4 | 49.0 
85-7|| 44-76] 605-5] 101-2)| 45-7 45°4 46:3 48-8 
92-8)|| 44-26) 600-3) 101-3)| 45-0 44.4 45-7 49.7 
76-9)| 46-21| 604-4) 93-1|]) 45-0 | 44-8 | 44.8 | 44.9 
81-6|| 45-00] 598-8) 96-1|)) 43-6 | 44:2 | 46-1 48-7 
94.4]| 43-79) 591-7} 99.5|)| 46-4 | 46-7 | 48.7 91-3 
83-2|| 42-64) 596-8} 99-0]| 48-0 48-5 50:7 53-4 
80-8)| 45-27| 600-0) 91-2)) 51-2 51-4 593-0 53-8 
93-7|| 47-96) 597-7] 133-3]] 51-1 50-4 | 50-3 50-3 
75-0| 45-54] 590-8} 90-6] 45-4 | 45-5 | 46-5 | 47-6 
88-9]| 49-17/ 595-6] 90-3]} 44-2 44-6 45.9 47-6 
85-6]| 42-17) 598-4) 95-0]) 42-2 | 42-7 | 44.5 | 46.7 
85-9)| 44-46) 593-1} 96-2)| 44-5 44-3 44:6 | 46-0 
78-2|| 43-45! 596-2] 93-4!) 44-0 44.3 45-3 | 46-4 
80-0) 45-87| 603-7} 81-6) 45-1 | 46-1 | 48.5 | 50.8 
89-3)| 44-26) 598-3) 112-2)| 43-0 43:3 44-4 45:3 
80-9) 44-73, 600-8) 109-7|| 43-2 43-7 45-3 46-2 



