826 Prof. Bache’s Lecture on the Gulf Stream. 
Tabie 2.—Table aovieg the probable uncertainty in the determination of maximum 
and oeene epee ts, by running the same section over in different years ad di er- 
ent obser 
Care Henry Section. 
n distances from the shore in miles 
| Row the curves re presenting th us the gruups. 
—~c |e 
Dates and names of observers. 38 5 x Hy F 5 X E EB iF é 
2. 2 Blea | Be = 5 Z & 
Os |< ide See 
Lt. G. M. Bache, 1846 93] 135] 187] 218] 260) 82 (369 
«§.P. Lee, 1847 | 91| 146) 185} 215] 241] 33 [888 
« R. Bache, TS46 52.2. ere eee 97| 146: 180! 19 | 287! 3281 7 
Means for three years. $4) 142] 184! 210; 279) 3. 8| 870 
Probable error for each year. [5°85] 4°27 (2°42 17°62| 11571718 
Care Hartrras Section. 
Lt. R. Bache, 1848 j 
Wide Malt, 1808. soos. sas csceces¥s | — 
Means for two year —| 82] 129) 159) 212| 26¢ 266) 338 
Probable error for = year 4°3| 2411 B| 15| 16 
| Means for both sect \5°85) 5-8] 34) 5-0) 6'4| Pusjll6 
=| 90! 4 oe, 214) 286/38 
75| 195| 57; 211] 256} 392 
| VOT St 
- 
Average uncertainty of peg and minima, 6°9 miles. 
cold wall and axis, 5 
all the iar points, T.. 
The other mode of testing the result is by the comparison of 
pe Pagar iis points in the different sections, each one elong- 
“ 
dred fathoms ae eat by an ascertained aie # tha 
essive minima and maxima to the fourth minimum inclusive. 
These results be that the cold wall minimum is ascertained, 00 
the average, within 088 mile, the axis maximum within two 
miles and a half, the second minimum within two a yee ; 
aximum, within four miles, and the fourth maximum within 
eight and a half miles, all tang ne ree except the last, 
he p 
siderably es than it would otherwise Le, probably frcm the 
