24G ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



On the 28th, sixty miles north of Bermuda, 2500 fathoms 

 were obtained, the surface currents setting at 60 east, half a 

 mile an hour. The current drag was again used, but no cur- 

 rent was apjDreciable at 500 fathoms. The vessel then pro- 

 ceeded to Bermuda, and left a second time on the 13th of 

 June for the Azores. On the 16th, at 2575 fathoms, reddish 

 ooze was found; and again on the lYth, at 2850 fathoms. 

 From this point for over 15 in longitude there was very little 

 variation in depth. On the 30th the Challenger reached 

 Fayal, and then passed to San Miguel. On the 9th of July 

 she started for Madeira, Avhich was reached on the 16th. She 

 then proceeded toward the Cape Verde Islands, leaving on 

 the 27th of July. Between Madeira and Palma 2400 fathoms 

 were obtained, and between Palma and the westernmost of 

 the Cape Verde Islands 2000 to 2400 fathoms, the deepest 

 water being nearer the latter. 



On the 2d of August the Challenger left Cape Verde Isl- 

 ands for Bahia, with a view of making her fourth section 

 across the Atlantic ; but as the rainy season had arrived, con- 

 siderable discomfort was experienced. She reached Bahia, 

 however, on the 15th of September, and after a short stay 

 off the Coast of Brazil, she left on the 25th for the Cape of 

 Good Hope. 



The latest advices from South Africa report her arrival 

 there after a successful voyage from Bahia. She stopped at 

 the island of Tristan d'Acunha, where two Germans were 

 found, who had been there for several years, and who very 

 gladly embraced the opportunity of leaving the island. 



EXPLORATIONS OF W. H. DALL IN THE ALEUTIAN ISLANDS. 



The explorations in the region of the Aleutians, commenced 

 by the United States Coast Survey, in charge of Mr. Dall, in 

 1871, have been continued during the present year with much 

 success. In the spring a schooner, named the Yuhon^ was fit- 

 ted out for his survey, and was found to answer her purpose 

 very satisfactorily. Mr. Dall left San Francisco on the 2d of 

 April, reaching Unalashka on the 20th of May, and returned 

 on the 6th of November. The field of labor embraced in the 

 survey consisted in determinations of the hydrography, the 

 coast -line, the magnetic variation, and other physical phe- 

 nomena, together with such observations in natural history 



