Observations on days of unusual magnetic disturbance, made at British Colonial Magnetic Observatories, under the Departments of the Ordnance and Admiralty. Part 1.--1840-1841. / Printed ... under the superintendence of ... E. Sabine.

  • Great Britain. Board of Ordnance
Date:
1843
Catalogue details

Licence: Public Domain Mark

Credit: Observations on days of unusual magnetic disturbance, made at British Colonial Magnetic Observatories, under the Departments of the Ordnance and Admiralty. Part 1.--1840-1841. / Printed ... under the superintendence of ... E. Sabine. Source: Wellcome Collection.

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    November 18, 19, and 20, 1841. November 18, 19, and 20, 1841. 1 M. Gott. Time. Decl. Hor. Force. A'ert. Force. M. Gott. Time. Decl. Hor. Force. Vert. Force. d. h. m. s. Sc,-Div”*. Sc.Div”®. Ther. Sc.-Div“. Tlier. d. h. m. s. Sc.-Div”®. Sc.-Div*. Ther. 1 Sc.-Div°®, Tiler, 19 3 35 0 38-8 19 2 0 0 50-4 61-3 65 27-6 63 40 0 i 38*9 58*2 18-7 3 0 0 38-3 61-5 16-6 43 0 ! 38-6 4 0 0 38-5 56-3 64 21-7 64 50 0 1 38-2 57-0 19-8 5 0 0 47-5 57-4 28-8 55 0 ' 38-1 6 0 0 48-1 57-8 63 29-6 62 4 10 0 38-0 55-8 64 64 7 0 0 45-6 59-0 27-4 15 0“ 38-7 8 0 0 44-2 58-9 62 27-3 61 20 0 38-6 55-4 24*2 9 0 0 42-4 58-4 28-1 25 0 39-1 10 0 0 39-9 58-6 64 29-0 63 30 0 39-9 55*6 25-5 11 0 0 41-7 58*1 30-1 35 0 40-6 12 0 0 41-1 54-0 65 27-8 63 40 0 41-0 56-0 26*6 13 0 0 45-9 52-7 26-4 45 0 42-0 14 0 0 53-4 54-6 68 22-2 67 50 0 44-4 57-1 27-5 15 0 0 57-7 58-0 15-8 5 5 0 46-7 16 0 0 62-5 57-4 70 17-6 69 10 0 46-7 57-8 28-0 17 0 0 63-7 57*9 21-1 15 0>^ 46* 6 1 18 0 0 61*9 55-7 73 23-9 70 19 0 0 56-6 56-1 20-9 Positions at the usual hours of observation, 20 0 0 54-6 56-0 72 20-6 69 November 18, 19, and 20. 21 0 0 51-0 54-8 25-6 67 22 0 0 49-4 55 ’3 68 25-9 18 0 0 0 44*1 66-0 59 31-6 58 23 0 0 48-0 57*3 25-8 1 0 0 45-0 64-7 34-1 20 0 0 0 41-8 52-2 66 20-4 65 2 0 0 42-4 64-3 58 32-8 57 1 0 0 42-8 56-6 23*9 3 0 0 44-3 64-4 35-6 2 0 0 44-6 65-0 65 14-4 64 4 0 0 46-2 65-6 58 35-2 57 5 0 0 47-2 65-3 35-2 The Mean Positions at the same hours during the Month 6 0 0 48-2 65-3 57 35-1 56 are given in page 96. 0 0 p;n • Q Qc: • o 8 0 0 o 63-7 67-1 57 -u 43-1 55 December 2 3. and 4. 1841. 9 0 0 50-9 67-4 27-5 10 0 0 53-0 61-8 58 33-0 56 11 0 0 48-4 55-7 35-5 [ Decl. 1 Scale Division = O'-72 12 0 0 46-3 51-1 58 39-6 57 Toronto * H. T. A = = -000076;9 = -0002 13 0 0 44-4 50-0 32-9 ( V. F. /t = = -000092;9 = -00018 14 0 0 47*4 58-1 61 34-0 60 Positions at the usual hours of observation, from F5 0 0 54-7 47-9 36-6 December 2nd, 12'>. to December 4th, 16*'. 16 0 0 61-0 51-6 63 35-8 62 n 0 0 57*2 57-5 34-2 2 12 0 0 56-9 83-5 47 54-4 47 18 0 0 62-3 56-3 67 34-4 65 14 0 0 55-0 59*7 47 57-7 47 19 0 0 58-7 57'7 35*9 16 0 0 60*8 63-2 47 56-4 47 20 0 0 55-2 57-7 68 38-8 64 18 0 0 64-1 61-1 47 50-0 47 21 0 0 60-6 53-2 42-5 20 0 0 57-8 55-6 47 46-0 47 22 0 0 52-9 52-8 68 35-6 65 22 0 0 46-2 25-9 46 40-6 47 23 0 0 48-2 53-3 32-2 3 0 0 0 62-0 96-5 46 48-2 47 19 0 0 0 37-4 50-6 67 29-0 64 2 0 0 48-5 39-3 46 51-5 47 1 0 0 37-0 52-6 29-7 4 0 0” 42-9 66-6 46 50-0 46 December 2, 3, and 4, 1841. M. Gott. Time. Decl. Hor. Force, j A’ert. Force. d. h. m. 8. Sc.-Div\ Sc.-Div i Ther. ] Sc.-Div®. Ther. 3 6 0 0 47-5 46-9 46 1 56-1 47 8 0 0 50-2 69-1 47 57-3 47 10 0 0 56-4 65-1 47 55-6 47 12 0 0 66-9 49-5 47 57-7 47 14 0 0 61-2 44-0 48 57-1 48 16 0 .0 500 49-4 48 1 49-9 48 18 0 0 60-2 57-8 49 : 53-2 49 20 0 0 53-9 60-5 49 i 42-3 48 22 0 0 58-0 63-8 49 i 51*0 48 4 0 0 0 51-9 64-7 48 i 49-7 49 2 0 0 58-8 78-8 47 ( 51-5 48 4 0 0 54-0 50-4 47 1 51-9 48 6 0 0 52-5 53-2 47 53-3 47 8 0 0 53 - 0 58-9 46 56-0 47 10 0 0 55-0 69-4 46 56-0 47 12 0 0 61-7 59-2 46 58-7 46 14 0 0 58-3 72-4 46 57-3 47 16 0 0 58-9 76-5 46 56-6 46 Mean Positions at the same hours during the Month. 0 0 0 58-5 93-0 41 58-9 42 2 0 0 56-9 88-1 41 60-0 42 4 0 0 56-9 82-7 41 59-1 41 6 0 0 52-0 73-2 42 59-6 42 8 0 0 50-8 80-3 43 60-4 42 10 0 0 54-5 84-1 43 60-1 43 12 0 0 59-8 81-5 43 61-0 43 14 0 0 60-2 82-1 43 59-9 43 16 0 0 58-6 82-9 42 58-9 43 18 0 0 58-1 84-9 42 59-4 42 20 0 0 56-5 84-6 42 58-0 42 22 0 0 57-6 86-1 41 58-7 42 St. Helena. 1 Cape of Good Hope f Decl. 1 Scale Division = 0' -75 { H. F. [ V. F. k = -000180 e ,q = -0003 Positions at the usual hours of observation, from December 2nd, 12*'., to December Ith, 11**. 2 12 0 0 52-5 75-1 67 13 0 0 50-2 79-8 67 14 0 0 49-7 75-5 66 15 0 0 48-8 75-2 66 No Aurora visible. During these observations the Decl. bar had a constant slight vertical motion, Saturdav midnight at 'i'an Diemen Island. Toronto, December, 1841.— Times of ohservution at which the Magnetometers were disturbed, but the mean readings were not materially changed, H. F. vibrating moderately. H. F. slight vibrations and strong shocks. H. F. moderate shocks. Decl. and H. F. moderate shocks. Decl. and H. F. moderate shocks. H. F. vibrating slightly. Decl. and H. F. moderate shocks. Decl. and H. F. moderate shocks. H. F. slightly vibrating. H. F. vilirating slightly. V. F. vibrating slightly ; H. F. moderately. H. F. much disturbed by vibrations. H. F. considerable shocks. H. F. vibrating slightly. Decl. and H. F. moderate vibrations and shocks. Decl. and V. F. vibrating very much. d. h. ;. 4 4 6 10 12 1 22 8 4 14 9 0 2 12 18 20 22 13 6 14 6 10 16 12 18 Dec. 16 20 Decl. 22 Decl. 17 0 Decl. 2 Decl. 4 Decl. 6 Decl. 8 Decl. 10 Decl. 12 Decl. 16 Decl. 18 Decl. 20 Decl. 19 18 H. F. 20 Decl. 22 Decl. 20 0 Decl. 2 Decl. 4 H. F. 12 H. F. 16 Decl. and V. F. slight vibrations ; H. F. moderate vibrations. slightly vibrating; H. F. moderately. vibrating very much ; H. F. slightly. and H. F. vibrating very much; V. F. slightly. and H. F. vibrating very much ; V. F. slightly. and H. F. vibrating very much ; V. F. slightly. and H. F. moderate vibrations and shocks. and H. F. slight shocks. moderate vibrations. vibrating slightly ; H. F. very much with shocks, viltrating slightly ; H. F. very much, slight vibrations ; H. F. very much with shocks, vibrating much. and H. F. vibrating very much with shocks. and H. F. slight vibrations and shocks. and H. F. vibrating slightly. and H. F. moderate vibrations and shocks. moderate shocks. slight shocks. slight shocks. The magnetometers at St. Helena were employed in temperature experiments. ^ The V. F. magnet was not in satisfactory adjustment.