THE BOTTOM OF TUE SEA. 



effect of ciirrcuts, so that no error may be occasioned 

 by the length ot" line carried away out of the })er- 

 pendicn^iir. Tlie most ingenious of these improved 



V'g. 2. — I>iotike*s Deep-sea Sounding A|)|iar:itus. 



contrWances is that invented by Passed Midshipman 

 Jo M. Brooke, of the United States Navy, who was 

 at the time associated with the celebrated Maury. 



