124 Scientific Intelligence. 
Now, if we take into account the quantity of positive energy in 
the form of heat carried by warm currents from the equator to 
the temperate and polar regions, and also the quantity of negative 
energy (cold) carried by cold currents from the polar regions to 
the equator, we shall find that they are sufficient to reduce the dif. 
ference of temperature between the poles and the equator from 
218° to 80°, 
e then increase the difference e normal temperature 
of the latitude of London being e stoppage of all ocean 
and aérial currents would thus reduce it 10°. Bu ulf- 
above all the lowering effects resulting from arctic currents.’ On 
Some parts of the American shores on the latitude of London, the 
temperature is 10° below the normal. The stoppage of all ocean 
and aérial currents would therefore lower the temperature there 
0 
oy Ss f 
at : author next shows that the climate of the arctic must be 
affecte 
these foregoing considerations show to what an extent the climatic 
condition of our globe is due to the thermal influences of ocean- 
