338 THE ATLANTIC. [CHAP. Vv. 
will be the resultant of the movement of the surface-water and 
the movement of the watch-buoy through the surface - water. 
This would be sufticiently simple if we could suppose that the 
surface-drift has no influence upon the watch-buoy, and that the 
movements of intermediate water do not affect the current-line; 
but we are well aware that this can not be the case, and as we 
have no data for estimating the amount of error arising from 
these sources, our current determinations can as yet be regarded 
only as approximations. Results for the 24th of April: 
Lat. 32° 18’ N. Long. 65° 38’ W. 
Surface-current...... N. 60 E., 0°24 of a mile an hour. 
Current at 50 fathoms N. 75 E., 0°46 s “ 
“ oo Cs N87 E086. «4 “ 
a 200 «& §. 70 Hi, 0:22 “ 
« 300 “- -§ 40E,008 « a“ 
= 400 = S. 65 E., 0-11 tS & 
«“ 500 “* N. 658,006 “ « 
¥ 600 “ No current detected. 
The results are shown in a diagrammatic form in Fig. 90. 
Surface buoy lor Log Fast 24 per hour ~. 50 fms 
Watch buoy 
100 fms Watch buoy 
200 fms Watch buoy 
Scale of 5 Cables = 4 Mile 
0 1 2 3 4 5 
SS EEE ar 
Fic, 90.—Result of Current Observations on April 24th, reduced to Diagrammatic Form. 
