120 Scientific Intelligence. 
that received at the equator; consequently the quantity of heat 
conveyed by the Gulfstream in one year is equal to the heat which 
alls on an average on 6,873,800 square miles of the arctic regions. 
The frigid zone or arctic regions contain 8,130,000 square miles. 
regions than it is at the equator, which is not the case. If we 
make due allowance for the extra amount absorbed in polar regions 
in consequence of the obliqueness of the sun’s rays, the total quan- 
tity of heat conveyed by the Gulfstream will probably nearly 
equal the amount received from the sun by the entire arctic 
regions. 
we compare the quantity of heat conveyed by the Gulfstream 
with that conveyed by means of aérial currents, the result is equally 
startling. The density of air to that of water is as 1 to 770, and 
same amou 
would raise 770 cubic feet of air 4°-2, or 3234 cubic feet 1°. The 
quantity of heat conveyed by the Gulf-stream is therefore equal 
i imes 
miles an hour, the current would require to be above 1200 feet 
deep. A greater quantity of heat is probably conveyed by the 
Gulfstream alone from the tropical to the temperate and arctic 
regions than by all the aérial currents which flow from the equator. 
* * : 
no heat from the tropical regions. After trave 
heat from the Gulfstream, or if it is preferred, from the warm 
two ways, viz: by direct radiation from the water, and by contact 
with the water. Now, if the G i 
deep current during its entire course similar to what it is at the 
Straits of Florida, it could have little or no opportunity of com- 
