SCIENTIFIC MEMOIRS. 



VOL. II.— PART VII. 



Article IX. 



Supplement to the Treatise entitled " General Theory of Terres- 

 trial Magnetism-\ ." By Professor C. F. Gauss, of the Uni- 

 versity of Gottingen. 



[Translated from the Resultate aus den Beohachtungen des magnetischen Verevis 

 im Jahre 1838. The references in the translation of the " Supplement '' are 

 made to the corresponding pages of the translation of the General Theory in 

 the Scientific Memoirs.] 



After the table of comparisons, pp. 216 — 219, was printed, 

 two slight inaccuracies were remarked in it : — the one at Callao 

 arose from a wrong longitude in the work refeiTed to in page 222 ; 

 that at St. Helena arose from an error of calculation. I have sub- 

 joined the corrected result at those two places, and have availed 

 myself of this opportunity to give the comparison of the theory 

 with observations at eight other stations which have since come 

 to my knowledge. 



t Translated in the Scientific Memoirs, vol. ii., Art. V 

 VOL. U. PART VII. Y 



