Magnetiske Intensitets-Iagttagelser. 109 



Observations on the Intenslty of Magnetism, 

 made with Professor Han steens Instrument, 



By Captain Phillip Parker King K. N. F« R. S., Com- 

 mander of His Britannic Mayefiys Ship Adventure, em- 

 ployed on a yoyage of Survey of the Southern extremity 

 of South America» 



No. 1. Madeira. 



31 th May 1826. The following is the refult o£ 

 an obfervation, tåken in the town cf Funchal, The 

 inftrument was placed on the feat of a Gane botlo- 

 med Chair in the garden of ihe British Conful. The 

 vibrations were counted by me, and ihe time mar- 



ked by an Asfistant 

 feconds per day. 



from a Chronometer going 



Time 



No. 



Time 



No. 



Time 



No. 



200 



Time 



No, 

 300 







59' 15" 2 



100 



2' l\5'7 



6' lyo 



10 



5l\,5 



110 



3 4,0 



210 



34,0 



310 



20 



55,5 



120 



25,5 



220 



55,0 



320 



30 



16,0 



130 



l\6,7 



230 



7 16,0 



330 



40 



37,5 



140 



4 7,5 



240 



37,0 



340 



50 



58,7 



150 



28,3 



250 



57,5 



350 



60 



1 19,5 



160 



49,3 



260 



8 18,5 





70 



40,5 



170 



5 10,3 



270 



39,5 





80 



2 1,7 



180 



31,5 



280 



9 0,0 





90 



22,0 



190 



52,3 



290 



21,7 





9' 42'5 



10 3,0 



34,0 



45,0 



6,0 



27,0 



11 



Summary 

 From to 300ih Vibrat, 10'29''3 



10 — 310 

 20 — 320 

 30 — 330 

 40 — 340 

 50—350 



300 Vibrations 



"U 



28,5 

 28,5 

 29,0 

 28,5 

 28,3 



10'28''68 

 628*68 



Lat. 32° 38' 25" N. 

 Long.l6°54'55"W.Grw. 

 Dip 62° 12,3 

 Var» about 15° W. 

 Rar. 30,30 inches 

 Therm» 66°0 Fahr, 

 Are. of Vibration be- 

 tween 20° and 2°. 



