Prof. Dove's Outlines of a general Iheory of the Winds. 233 



tunity of observing more frequently than myself, that the winds 

 do not follow the same rule in this hemisphere as in the north- 

 ern hemisphere; in this they make the circuit of the compass 

 from north to north-east, to east, to south-east, to south, &c. : 

 in the southern hemisphere, on the contrary, they move in an 

 opposite direction; the hurricanes, the tempests and the gusts 

 appear to me to be subject to this same law in both hemi- 

 spheres. Physicists have hitherto given no explanation of 

 this phenomenon." 



3. Pacific Ocean. — (Don Ulloa)*. " The wind in the South 

 Pacific Ocean is never fixed in the NE., nor does it ever 

 change from thence to the E. ; its constant variation being to 

 the W. or SW., contrary to what is seen in the northern 

 hemisphere. In both the change of the wind usually corre- 

 sponds with the course of the sun ; hence, as with us, it changes 

 from E. to S., and thence to W.: there it is from E. to N. and 

 thence to W." 



4. South Sea.— (Forster)f. " Between 40° and 60° south 

 latitude, in the year 1773, we quite unexpectedly met with 

 easterly winds, which were very contrary to our course at the 

 time. It was also remarkable that every time the wind changed, 

 which was the case four times between June 5th and July 5th, 

 it gradually moved round half the compass in a direction con- 

 trary to the course of the sun." I believe I may understand 

 Forster to have borrowed this expression in the way usual 

 among navigators from the course of the sun in the northern 

 hemisphere. 



It would be very desirable to find remarks on this subject 

 with regard to the southern hemisphere in the works of Basil 

 Hall. I have looked for them in vain. 



To these authorities I add, that all the descriptions I am ac- 

 quainted with of storms in the southern hemisphere, give a 

 rotation corresponding to the above. 



II. Northern Hemisphere. 



1. England^ 1600. (Bacon's Draught for the Particular 

 History of the Wind. Sect. xii. Philosophical Works, by 

 Shaw. Lond. 1733. 4to. vol. iii. p. 476.) 



" When the wind changes conformably to the motion of 

 the sun; that is, from east to south; from south to west; from 

 west to north ; and from north to east ; it seldom goes back ; 

 or if it does 'tis only for a short time : but if it moves in a 

 contrary direction ; viz. from east to north ; from north to 

 west; from west to south ; and from south to east; it generally 



• Voyage to South America, vol. i. p. 8. ch. 3. 

 t Bemerkungcn, S. 111. 



Third Series. Vol. 11. No. 67. Sept. 1837. 2 H 



