168 Observations of Vibrations for the Absolute Horizontal Intensity, 1844. 



Date. 



Feb. 17 



N. End of Magnet moving E. 



No. 



of 



Vib. 





 6 

 10 

 16 

 20 

 26 

 30 

 36 

 40 

 46 



Time 



of 



Transit. 



5 9 53-7 



11 

 12 

 14 

 15 

 16 

 17 

 19 

 20 

 21 



26-7 

 29-0 

 2-2 

 4-2 

 37-5 

 39-6 

 12-9 

 150 

 48-1 



No. 



of 



Vib. 



50 



56 

 60 

 66 

 70 

 76 

 80 

 86 

 90 

 96 



Time 



of 



Transit. 



5 22 50-1 



15-528 

 532 

 526 

 524 

 530 

 522 

 522 

 518 

 520 

 518 

 Mean observed time of one vibration = 15 3 -5104 



24 

 25 

 26 

 28 

 29 

 30 

 31 

 33 

 34 



23-3 

 25-3 

 58-4 



0-7 

 33-6 

 35-7 



8-8 

 110 

 44-0 



Time of 

 one 

 Vib. 



N. End of Magnet moving W 



No. 



of 



Vib. 



1 

 5 

 11 

 15 

 21 

 25 

 31 

 35 

 41 

 45 



Time 



No. 



of 



of 



Transit. 



Vib. 



m. s. 





10 7-3 



51 



11 9-3 



55 



12 42-6 



61 



13 44-5 



65 



15 17-7 



71 



16 19-7 



75 



17 52-7 



81 



18 54-8 



85 



20 27-7 



91 



21 29-8 



95 



Time 



Of 



Transit. 



23 

 24 

 25 

 26 

 28 

 29 

 30 

 31 

 33 



2-8 

 4-7 

 37-8 

 39-6 

 12-4 

 14-5 

 47-3 

 49-3 

 221 



34 240 



Time of 

 one 

 Vib. 



Semi-arc of vibration, commencing 10 

 of magnet, 43°-l. 



h. 

 15-510 5 



508 

 504 

 502 

 494 

 496 

 492 

 490 

 488 

 484 



ending 4 



Bifilar. 



Time 



of 

 Obs. 



11 



20 

 25 

 W 



Mean 



Read- 

 ing 

 Cor. 



42-9 



Sc. Div. 



521-8 

 5250 

 525-9 

 525-9 



524-6 



Temperature 



Ther- 

 mome- 

 ter. 



Mar. 23 



6 

 10 

 16 

 20 

 26 

 30 

 36 

 40 

 46 



26 11-4 



50 



4 39 9-4 



27 44-8 



56 



40 42-9 



28 47-0 



60 



41 45-2 



30 20-3 



66 



43 18-5 



31 22-7 



70 



44 20-8 



32 56-0 



76 



45 54-2 



33 58-3 



80 



46 56-2 



35 31-7 



86 



48 29-8 



36 33-9 



90 



49 32-1 



38 7-3 



96 



51 5-5 



Mean observed time of one vibration 



15-560 

 562 

 564 

 564 

 562 

 564 

 558 

 562 

 564 

 564 



= 15s-5302 



1 

 5 

 11 

 15 

 21 

 25 

 31 

 35 

 41 

 45 



26 

 27 

 28 

 30 

 31 

 32 

 34 

 35 

 36 

 37 



24-4 



51 



26-7 



55 



59-8 



61 



1-9 



65 



350 



71 



37-1 



75 



10-2 



81 



12-3 



85 



45-3 



91 



47-4 



95 



39 

 40 

 41 

 42 

 44 

 45 

 47 

 48 

 49 

 50 



20-3 

 22-3 

 55-2 

 57-2 

 301 

 32-1 

 50 

 6-3? 

 39-5 

 41-2 



15-518 



4 30 



521-6 



512 



36 



519-4 



508 



40 



520-2 



506 



45 



521-4 



502" 



50 



521-3 



500 







496 



Mean 



520-8 



480 







484 







476 







44-0 



44-1 



Semi-arc of vibration, commencing 7J°, ending 2°. 

 of magnet, 46°-2. 



Temperature 



May 29 



6 

 10 

 16 



20 

 26 

 30 

 36 

 40 

 46 



20 59-2 



50 



9 34 1-3 



22 33-3 



56 



35 35-2 



23 35-8 



60 



36 37-8 



25 9-5 



66 



38 11-6 



26 12-2 



70 



39 14-1 



27 461 



76 



40 47-8 



28 48-7 



80 



41 50-3 



30 22-4 



86 



43 24-2 



31 25-0 



90 



44 26-8 



32 58-9 



96 



46 0-5 



Mean observed time of one vibration 



15-642 1 21 14-0 51 34 15-9 15-638 



638 5 22 16-7 55 35 18-6 638 



640 11 23 50-6 61 36 52-2 632 



642 15 24 53-0 65 37 54-8 636 



638 21 26 26-8 71 39 28-7 638 



634 25 27 29-4 75 40 31-2 636 



632 31 29 3-2 81 42 4-9 634 



636 35 30 5-8 85 43 7-4 632 



636 41 31 39-7 91 44 41-3 632 



632 45 32 42-2 95 45 43-7 630 

 = 15 s 6358. Semi-arc of vibration, commencing 6-J-°, ending 5° 

 of magnet, 52°-6. 



9 20 



535-7 



25 



535-3 



30 



535-2 



35 



535-5 



40 



537-2 



45 



535-2 



Mean 



535-7 



52-4 



Temperature 



Aug. 5 



Dec. 26 



6 17 32-2 50 6 30 330 



10 

 16 

 20 

 26 

 30 

 36 

 40 

 46 



19 6-2 



20 

 21 

 22 

 24 

 25 

 26 

 27 

 29 



8-7 

 42-4 

 44-8 

 18-4 

 20-9 

 54-6 

 57-0 

 30-6 



56 

 60 

 66 

 70 

 76 

 80 

 86 

 90 

 96 



32 6-7 



33 9-3 



34 42-8 



35 45-2 

 19-0 

 21-4 

 54-9 

 57-4 

 31-0 



37 

 38 

 39 

 40 



42 



15-616 

 610 

 612 

 608 

 608 

 612 

 610 

 606 

 608 

 608 



1 

 5 

 11 

 15 

 21 

 25 

 31 

 35 

 41 

 45 



17 45-9 



18 48-3 



20 220 



21 24-5 



22 58-0 



24 0-4 



25 33-9 



26 36-4 



28 10-0 



29 12-4 



51 

 55 

 61 

 65 



71 

 75 

 81 

 85 

 91 

 95 



30 



45-8 



31 



48-4 



33 



21-9 



34 



24-3 



35 



57-8 



37 



0-3 



38 



33-8 



39 



36-3 



41 



9-7 



42 



12-2 



15-598 

 602 

 598 

 596 

 596 

 598 

 598 

 598 

 594 

 596 



Mean observed time of one vibration = 15 s- 6036. Semi-arc of vibration, commencing 7 \°, ending 5°. 



of magnet, 64° - 7. 



6 20 



541-9 



25 



540-5 



31 



540-1 



38 



540-8 



39 



540-3 



Mean 



540-7 



63-3 



Temperature 







6 

 10 

 16 



20 

 26 

 30 

 36 

 40 

 46 

 Mean observed ti 



23 

 24 

 25 

 27 

 28 

 30 

 31 

 32 

 33 



18-1 



50 



51-1 



56 



53-2 



60 



26-2 



66 



28-3 



70 



1-4 



76 



3-3 



80 



36-5 



86 



38-6? 



90 





96 



36 



13-3 



37 



46-3 



38 



48-3 



40 



21-2 



41 



23-1 



42 



561 



43 



58-0 



45 



30-9 



46 



32-8 



5-504 



1 



23 34-6 



51 



504 



5 



24 36-8 



55 



502 



11 



26 9-8 



61 



500 



15 



27 12-0 



65 



496 



21 



28 45-2 



71 



494 



25 



29 47-2 



75 



494 



31 



31 20-3 



81 



488 



35 



32 22-5 



85 



484 



41 



33 55-6 



91 





45 



34 58- 



95 



36 



30-8 



37 



32-9 



39 



60 



40 



8-2 



41 



41-2 



42 



43-3 



44 



16-3 



45 



18-3 



46 



51-4 



5-524 



4 25 



540-0 



522 



30 



539-8 



524 



33 



540-3 



524 



42 



539-0 



520 



45 



538-3 



522 







522 



Mean 



539-5 



516 







516 







33-05 



me of one vibration = 15 s, 5086. 



Semi-arc of vibration, commencing 3°-6, ending 1°-1. Temperature 

 of magnet, 33°-8. 



