OF THE MAGNETIC NEEDLE. 



9 



Date. 

 1828. 



Time. 



Barometer 

 by 



Troughton. 



Attached 

 Thermometer. 



Detached 

 Thermometer. 



Declination 

 East of the 

 North end of 

 tlie Needle. 



Declination 

 West of the 

 South end of 

 the Needle. 



Mean Declination East. 



February. 





H. 



g 



M. 



55 





IliCllCS. 



30*032 



o 



o 



i>\> 



2° 25' 



HM 



2° 



30' 



An" 









Q 



9o 









7"J 



2 



21 





2 





\t\ 

 'wy 







7" 





nn 

 uu 



p. M. 



29*908 



OZ 





2 



25 





o 

 u 



23 









Q 

 o 



Q 

 o 



Zl 



A. M. 



ou V^O 



Mi t> 



68 



2 



22 





o 







By Needle No. 1. 











52 



P. M. 



30 012 



74 



77 



O 



£t 



9/1 



40 



2 



27 



20 



2° 25' 22" 







4 



40 



P. M. 



29*970 



78 



80 





20 



20 



2 



25 



30 







9 



7 



35 



A. M. 



30 032 



58*5 



01 



*> 





40 



2 



20 



30 













30 



P. M. 



30*000 



73 



70 



Z 



Oft 



00 



2 



25 



00 









5 



10 



P. M. 



30010 



75 



78 





1 il 



00 



2 



27 



50 







10 







48 



A. M. 



30100 



05*5 



07 



2 



23 



00 



2 



30 



00 













08 



P. M. 



30*050 



73.5 



70 



2 



23 



30 



2 



20 



50 







11 



9 



10 



A. M. 



30*054 



03 



04 



2 



21 



20 



2 



23 



10 









1 



00 



P. W. 



30*018 



72*5 



70 



2 



21 



40 



2 



27 



00 









5 



00 



P. M. 



29 970 



73 



74 



o 



ot 



00 



2 



30 



40 







12 



9 



00 



A. M. 









2 



24 



50 



2 



25 



00 









15 



15 



P. M. 



29*970 



78 



79 



<> 



2^ 



10 



2 



25 



20 







14 



8 



40 



A. M. 



30*088 



03 



04 



2 



35 



10 



2 



27 



10 













30 



P. M. 



30*072 



75 



77 





oa 



30 



2 



20 



20 









5 



12 



P. M. 



29*988 



78 



79*5 



2 



25 



50 



2 



24 



30 







15 



8 



15 



A. M. 



30*088 



04 



05*5 



2 



31 



10 



2 



25 



30 



By Needle No. 2. 











50 



P. M. 



30*080 



77 



79 



2 



27 



10 



2 



20 



10 



2° 27' 46" 







5 



12 



P. M. 



30048 



79*5 



80*5 



2 



31 



20 



2 



29 



30 







10 



9 



00 



A. M. 



30*000 



03 



05 



2 



28 



40 



2 



20 



40 









11 



50 



A. M. 



30 090 



73 



75*5 



2 



29 



20 



2 



23 



30 









4 



54 



P. M. 



29*920 



79*5 



80*5 



2 



28 



00 



2 



23 



00 







17 



8 



02 



A. M. 



30*010 



00 



CO 



2 



28 



40 



2 



20 



20 







19 



8 



25 



A. M. 



30*112 



00 



08 



2 



23 



20 



2 



29 



00 







22 







58 



P. M. 



00*072 



84*5 



80 



2 



25 



30 



2 



22 



00 









4 



27 



P. M. 



30*000 



90*5 



90 



2 



29 



10 



2 



29 



30 







23 



9 



30 



A. M. 



30*050 



73*5 



75 



2 



33 



00 



2 



20 



00 



By Needle No. 3. 











30 



P. M. 



30*014 



83 



85 



2 



29 



10 



2 



26 



20 



- 2° 27' 29" 







5 



35 



P. M. 



29-942 



89*5 



89*5 



2 



28 



30 



2 



24 



30 







24 



9 



30 



A. M. 



30 030 



70*5 



77*0 



2 



29 



00 



2 



20 



20 









9 



27 



P. M. 



29*980 



83*5 



85*5 



2 



30 



00 



2 



27 



10 









5 



42 



P. M. 



29*920 



89*5 



890 



2 



27 



40 



2 



27 



20 





Mean of Needle, No. 1, 



No, 2, 



No, 3, 



Mean of three Needles, 



Add error of Zero in Compass Box, . 



Declination East, 



D 



2 



27 



46 



2 



27 



29 



2 





52 





14 



24 



2 





16 



