36 On the Distribution of Temperature in the Gulf Stream. 
The diagrams of the Sandy Hook sections, Nos. 4 and 5, 
show this sudden change very strikingly between positions 13 
and 14, the probable minimum lying, however, inside of 13. 50, 
also, the Cape Henry diagrams, Nos. 6 and 6 bis. The “ cold 
wall” minimum and axis maximum are shown on diagram 10, on 
the same scale of miles at the top of the diagram, and tempera- 
ture at the side. That the “cold wall” exists south of Hatteras 
is proved by the same diagram, where the Cape Fear, Charleston, 
and St. Simon’s sections are compared wy il those for Cape Henry, 
Cape May, and Sandy Hook. he erence of temperature is 
less for the southern sections, but it is stil strikingly marked. : 
In the cold water inshore from the Gulf Stream, Acting Mas- 
ter Jones, of Lieut. Maffitt’s party, found a curent setting ‘south- 
ward, as also in the cold band outside of the These results, 
if shown to be permanent, will be in the as degree iraport- 
ant. As it is, the existence of them at any time shows the 
cause of many rier euler by navigators in relation to the 
currents of the Gulf Str 
The investigations anit to currents remain to be made in 
detail, though some results “have already been procured. It is 
important in work like this to confine the special attention of ob- 
servers to a few problems at atime, that they receive close ex- 
amination 
As th warm water of the Gulf Stream flows onward and out- 
ward from the axis at and near the surface, the stratum, asa 
general rule, becomes thinner. The current is then outward 
from the axis as well as onwar 
5. The changes of the position of the remarkables points in 
the sections with the season, and other circumstances, are under- 
going + ieee some results having been already collected. 
6. Chart of the Gulf Stream. 
The «weal bands of warm and cold water into which the 
ocean in and near the Gulf Stream is divided, are shown in the 
chart now presented, as deduced from the discussion already re- 
ferred to. The higher temperatures are represented by the darker 
shades. The axis of the stream is marked by the darkest full 
shade, and the axis of the colder and warmer bands on each side 
of it by thinner shades, distinguished as stated on the chart. The 
axis, where it crosses the Sandy Hook section, is seen to take the 
general feet of the trend of the coast, which is even more 
closely followed by the “cold wall” axis. These lines are drawn 
with a free hand among the points by which they would be rig- 
idly determined in the several sections, so as to give a general 
consistency to their form. The variations from the points rig- 
idly sper are generally of the same order with the probable 
errors of those arn The probable outer limit of warm wort 
is designated on the chart. 
