10 THREE CRUISES OF THE “ BLAKE.” 
As soon as the sinker strikes bottom, which is made apparent 
by the stopping of the reel, read the register and the odometer, 
and at the same time ship the crank on the axles of the reel, 
and, to insure the detachment of the sinker, pay out a few turns 
игн 
Fig. 6. — Sigsbee's Detacher, and Fig. 7. — Se Мол ‘of Fig. 6. Fig. 8. — Belknap’s Cylin- 
Belknap’s Sounding Cylinder. (Sigshee. ) der detached from. Shot. 
(Sigsbee. ) (Sigsbee.) 
of the wire by hand, until it feels slack. Then reel in a few 
turns, and the distance that the cross-head travels down its 
guides will indicate if the sinker has .been detached. Gener- 
ally, with a good form of detacher, it drops off on striking bot- 
tom. In place of the Stellwagen cup, rod, and detacher, used 
in Fig. 4, we may use for deeper soundings the sounding-rod, 
composed of Sigsbee’s detacher in connection with a modification 
of Commander Belknap’s cylinder No. 2. During the descent 
the cone J is kept up by the shot, as shown in Figs. 6 and 7, 
