xxxvlii Report — 1859. 



gave rise to the voyage of Sir James Clark Ross to the Southern and Ant- 

 arctic Regions in the years 1839-1 843. The magnetical results, in the de- 

 termination of the isomagnetic lines over a large portion of the southern 

 hemisphere, were published in the Phil. Trans, for 1842, Art. II. ; for 1843, 

 Art. X.; and 1844, Art. VII.: and one part yet remains to be completed, 

 comprehending the meridians between Cape Horn and the Cape of Good 

 Hope ; its publication having been deferred in consequence of the more 

 pressing publications of the Colonial Observatories. 



3. A proposition for a Magnetic Survey of the British Possessions in 

 North America was brought before the British Association in a Report 

 published in their Transactions for 1837, and having been subsequently 

 submitted to the Committee of Physics of the Royal Society, received in 

 1841 the recommendation of the Royal Society to Her Majesty's Government. 

 The Survey, having been authorized by the Treasury, was carried on in con- 

 nexion with the Magnetic Observatory at Toronto in Canada, under the 

 direction of the Superintendent of the Colonial Observatories, by Lieut. 

 (since Colonel) Lefroy, R.A. The results in regard to the isoclinal and 

 isodynamic lines have been published in the Phil. Trans, for 1846, Art. XVII. 

 The declination observations have been reduced and coordinated with 

 similar observations made in the succession of Arctic Voyages between 1818 

 and 1855, in a memoir, now in preparation, which will include the British 

 Possessions in North America and the countries which have been explored 

 to the north of them. 



4. The Survey of Sir James Ross in 1839-1844 having left a portion of 

 the magnetic lines in the southern hemisphere undetermined between the 

 meridians of and 125° E., an application was made in 1844 to Her Majesty's 

 Government by the Royal Society, to complete this remaining portion under 

 the direction of the Superintendent of the Colonial Observatories. This was 

 accomplished in 1845 by Lieut, (since Captain) T. E. L. Moore, R.N., and 

 Lieut, (since Major) Henry Clerk, R.A., in a vessel hired by the Admiralty 

 for the purpose, and despatched from the Cape of Good Hope. The results 

 of this Survey were published in the Phil. Trans, for 1846, Art. XVIII. 



5. At the Cambridge Meeting of the British Association in 1845, a recom- 

 mendation was made to the Court of Directors of the East India Company, 

 that a Magnetic Survey should be made of the Indian Seas in connexion with 

 the Magnetic Observatory at Singapore. This recommendation was com- 

 municated to and concurred in by the Royal Society. The Survey, having 

 been entrusted to Captain Elliot, of the Madras Engineers, was completed in 

 1849, and the results were published in a memoir by Captain Elliot in the 

 Phil. Trans, for 1851, Art. XII. 



6. A proposition for a Magnetic Survey of British India having been sub- 

 mitted to the British Association, in a Report printed in the Transactions for 

 1837, a scheme for the execution of such a Survey was submitted to the 

 Court of Directors of the East India Company by Captain Elliot on his com- 

 pletion of the Survey of the Indian Seas; and having been referred to the 

 Royal Society, received their warm approbation. The Court of Directors 

 having approved the scheme suggested by Captain Elliot, that officer pro- 

 ceeded to India in 1852 for the purpose of carrying it into execution, but 

 died shortly after his arrival at Madras, in August 1852, having but just 

 commenced the operations of the Survey. 



7. In April 1853 a letter was addressed to the President of the Royal 

 Society by the Prussian Minister, Chevalier Bunsen, recommending, by desire 

 of His Majesty the King of Prussia, the Messrs. Schlagintweit, well known 

 by their physical researches in the Eastern and Western Alps, as fitting sue- 



