ee ee ees ap 
relative to the Earth’s Surface. 33 
be continually accelerated or retarded, which cannot arise from 
any mutual action between the surface of the earth and the sur- 
rounding atmosphere. Now, as the part of the earth’s surface 
where the motion of the atmosphere is west is much farther from 
the axis than the part where it is east,.the latter part must com- 
prise more than half of the earth’s surface, unless the velocity of 
the eastern motion towards the poles is much greater than that of 
the western motion near the equator. Therefore; since one-half 
of the earth’s surface is contained between the parallels of 80°, 
the parallels of no east or west motion at the earth’s surface must 
fall within these parallels, and they are accordingly found on 
the ocean to be near the tropics. Hence the maximum height 
equator, these tendencies combine, and produce a strong surface 
current, wh 
: can have no motion 
at the earth’s surface, there are calm belts there, _ 
4a Jour. Scr.—Szconp Series, Vor. XXXI, No. 91.—Jay., 1861. a 
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