CHAP. V.] 



DEEP-SEA SOUNDING. 



211 



much time and are too valuable to admit so large 



an average of losses. 



Fig. 3S. — Brooke's Deep-Sea Sounding Apparatus. 



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

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



p 2 



