CHAP. V.] 



DEEP-SEA SOUNDING. 



211 



much time and are too valuable to admit so large 

 an average of losses. 



Fir;. 3S. Brooke's Peep-Sea Sounding Apparatus. 



About the year 1854, J. M. Brooke, passed-mid- 

 sliipman in the U.S. navy, a clever young officer who 



