APPENDIX. 



i. 



EXPERIMENTS MADE ON BOARD U. S. SHIP VINCENNES, 9TH APRIL, 1840. 



TIME. 



sun's alt. 



SKY. 



DEPTH POT SEEN. 



CURRENT. 



10 A. M. 



38° 



Clear. 



16 fathoms. 



None. 



11 " 



48 



n 



16 



1 fathom north. 



12 noon. 



50 



tt 



17 



1 " west-northwest. 



1 P. M. 



47 



a 



17 " 



2 " " 



2 " 



40 



« 



15 



2 " " 



3 " 



30 



u 



15 " 



2 " " 



4 « 



19 



(( 



14 " 



2 " west-by-south. 



5 " 



7 



(( 



14 " 



2 " " 



6 " 



4 



(i 



13 " 



2 " west-southwest. 



EXPERIMENTS MADE ON BOARD U. S. SHIP PEACOCK, 31 ST MARCH, 1840. 



Water at the surface stood at 



" 10 fathoms below the surface stood at 





tt 



20 





(£ 



30 





U 



40 





a 



50 

 60 





tt 



70 





u 



80 





tt 



90 





tt 



100 





a 



200 





a 



300 





a 



400 





a 



500 



VOL. III. 







75° 



70 



72 



73 



711 



72 



71| 



71* 



71* 



69* 



73 



63i 



56 



52 



49 



106 



