An Account of Observations made in Scotland on the Distribution 

 of the Magnetic Intensity. By JAMES DUNLOP, Esq. Com- 

 .1 municated by Sir T. M. BRISBANE, K. C. B. 



' ; ; \-''/'-'' r -. ,; '. ! ' 



(Read 19th April 1830.) 



Makerstoun, Kelso, 15th March 1830. 

 MY DEAR SIR, 



ACCOMPANYING I beg leave to transmit you Mr DUNLOP'S pa- 

 per on the distribution of the magnetic intensity over this coun- 

 try, which I formerly mentioned when I had the pleasure of 

 seeing you, and which I request you will lay before the Royal 

 Society. 



Mr DUNLOP has so fully and clearly detailed his mode of pro- 

 ceeding with these observations, that it would be unnecessary for 

 me to enlarge upon them further, than to state, that, in point of 

 number, extent of country, combined with precaution, accuracy, 

 and consistency, I consider they are unrivalled in this or any 

 other country. 



While on this subject, it might not be considered as irrele- 

 vant in me to express the regret I feel that this important branch 

 of science should have been so much neglected in Great Britain ; 

 and I am induced to make the remark, from the valuable assist- 

 ance I obtained from Professor HANSTEEN'S magnetic chart, in 

 my voyage to New South Wales and home ; as, by comparing 

 the position of the ship, inferred by his magnetic curve, it was 

 found to agree, in an extraordinary manner, with the true place 

 on board, whilst the dead reckoning was erroneous to the extent 



VOL, XII. PART I. A 



