APPENDIX. 337 



No. III. 



Observations of the mean magnetic inclination made on shore in 

 the Voyage of H. M.S. Rattlesnake, by Lieut. Joseph Bay- 

 man, R.N. Instruments employed: Robinson's 6-ineh 

 Inclinometer ; Fox's Dipping Apparatus. 



The following tables contain the absolute determinations of 

 the magnetic inclination and declination made in the Voyage of 

 H.M.S. Rattlesnake on shore. A very large series made almost 

 daily at sea with Fox's instrument and the Azimuth Compass 

 require several corrections before they are fit for publication. 



Madeira. 

 In Mr. Veitch's verandah, Funchal, by Robinson's 



Needle, A. . . . . . 59° 41' 7 N 



Ditto ditto, by Fox's Needle, A 60 40 2 N 



On the summit of the Pico dos Bodes, ditto . 64 10 5 N 

 Ther. 64. Ditto angle of deflection, 



2 grains ditto . 33 13 6 



Ther. 59. Funchal ditto, 2 grains 38 8 8 



Rat Island, Rio de Janeiro. 

 By Robinson's Needle, A. 1 . . . 12 15 I S 



Ditto A. 2 . . 12 19 1 S 



Mean 12 17 1 S 



Simon's Bay, Cape of Good Hope. 

 In the dockyard near the Observation spot of Ere- 

 bus and Terror, by Fox's Needle A, with index 

 error applied . . • . 53 40 S 



Tonnelier's Island, Port Louis, Mauritius. 

 By Robinson's Needle, A 1 . . . 53 48 9 S 



Ditto A 2 . . . 53 48 8 S 



Mean 53 48 8 S 

 VOL. I. z 



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