Miscellaneous Intelligence. 439 
all the currents of the ocean, with perhaps one exception, the Gu 20 
stream, which had been, in its more important eatures, careful X- 
h ic t 
instrument by no means perfect. he determination, however, of 
oceanic currents, to which the ee communication referred, depends 
simply on induction from observation of temperature, and that mainly 
indicated, yet still the general result found important and useful. 
The rches of the author embrace those in the Greenland Sea, the 
North and a considerable belt across the North Atlantic. To 
those in the North Atlantic he wished at present to direct attention ; and 
to a belt of it embraced within the limits of a series of passages chiefly 
by sailing vessels between England, or some European port, and New 
York. these passages, sixteen in number, four were performed by 
the author himself, and twelve were supplied by an American navigator, 
Capt. J. C. Delano, an accurate scientific observer. The o bservations 
day of each passage, the ean day at sea was found to be May 18th or 
19th,—a day fortunately pets neg in singular nearness with ‘the prob- 
able time of the mean annual oceanic pcp Peat The author had 
laid down the tracks of the ship in each of the voyages, on a chart of 
Mercator’s projection, and the principal ania on Surface Tem 
perature were marked in their respective e places. The obverva sions 
were then tabulated for meridians of 2° in breadth, from Cape Clear, 
longitude 10° W., to the eastern point of te Island, faints 12° Was 
_-embracing a belt of the average breadth of 22 miles, or a stretch of 
about 2,600 miles across the Atlantic. The results were the following : 
u 74° ; 
from the means of each meridional section, 56°, _— the mean atmos- 
pheric temperature for the corresponding perio od w s §4°-2.—3. Range 
of Surface Temperature within each meridional section of 2°, 84° at 
the lowest, being in longitude 20-22" W., and at the ements 36°, being 
sixteen meridional sections being 51°-88, and the at ran ‘3. 
—d. In the succeeding fone sections, where the lowest temperature 
w °, the average lowes as 37°: the average ran a: 
