FIGURE I. SIDE ELEVATION. 
IMPROVED MACHINE 
FOR SOUNDING WITH WIRE 
ON THE PRINCIPLE OF SIR WM. THOMSON 
BY LIEUT. COMDR. C.D.SIGSBEE,U.S.N. ASSISTANT C.S. 
LL iT —— 
THE HELIOTYPE PRINTING VO 220 DEVONSHIRE ST. BOSTON, 
