PLATE IT. 



THE DEPTHS OF THE OCEAN. 207 



PLATE HL 



BROOKE'S DEEP-SEA SOUNDING APPARATUS. 



southward of the Grand Banks of Newfoundland. No satisfactory- 

 deep-sea soundmgs, either in the Pacific or Indian Oceans, have 

 as yet been made by those who are co-operating in this admirable 

 plan of research.* A few have been made in the South Atlantic, 

 but not enough to justify deduction as to its depths or the shape 

 of its floor. 



* Since the above was ■written, I have received a letter from Captain Ringgold, 

 commanding the Surveying Expedition in the Pacific, informing me that, on his way 

 out, he had obtained, in the southern hemisphere, a deep-sea sounding, with bottom 

 at the depth of eight thousand fathoms. The notes and details of this cast have not 

 yet been received. 



