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Prof. Bache’s Lecture on the Gulf Stream. 317 
continued by some of the officers of the survey, though, at such 
has been extensively used of late years. Mr. Saxton’s indicator 
is more simple than Massey’s, but acts aE the same principle. 
e cord of the lead line, 
is drawn up. In Commander Sands’ sounding apparatus a 
spring keeps an outer cylinder over an opening 1n an vlind hol- 
low one, until it reaches the bottom, when the ae cy under 1s 
orced upwards and the opening at the side of the inner one, 
Which, having a conical termination, penetrates the bottom, per- 
: 8 ass in. On raising the 
soundings bei g, a 
Rhetinienop don a poe adapted to that class of work. 
