PART III. 



APPENDIX. 



Of the various scientific observations made 

 during the absence of Captain Buchan s expedi- 

 tion from England, those on the length of the 

 pendulum vibrating seconds ; on the dip, intensity, 

 and magnetic force, of the needle ; the tempera- 

 ture of the sea at various depths, as compared 

 with that at the surface, and on the currents of 

 the ocean, are the most interesting ; and of these 

 a short notice will not, we trust, be considered 

 superfluous. 



No. I. 



An Abstract of Experiments made at Spitzbergen, to de- 

 termine the length of the pendulum vibrating seconds, 

 1818. By the Rev. George Fisher, Astronomer to the 

 Expedition. 



The pendulum was attached to a clock made 

 by Shelton, the property of the Royal Society. 

 The rod was cylindrical, the bob of a lenticular 

 shape, and the whole of brass, cast in one solid 

 mass. It vibrated upon blunt edges of steel, in 

 hollow cylinders of agate ; and the clock was 

 supported upon a strong, oaken, tripod stand. 

 The plane of vibration was adjusted to a vertical 



