

NATURAL PHENOMENA OF THE EQUATORIAL REGION!. 37 \ 



I recommend, as by moving the telescope round the circle. 

 Besides, this method is applicable either to the azimuth or and is applica- 

 altitude circle, or indeed to any circle which turns upon its^Vj* upon** 

 awn axis, whereas the French method can never be applied their own axis, 

 to the azimuth circle, or to any other circle, which does not j^nclniiilM 

 turn both upon its own axis, and upon one which is perpen- is not. 

 dicular to it. , 



After all, however, it is possible, that the process which I 

 have been explaining to you may be no new discovery, and 

 that you maybe already acquainted with it. If this should 

 be the case, you will be kind enough to inform me. At any 

 rate, indeed, I should esteem myself greatly obliged, if 

 you would favour me with your sentiments upon the subject, 

 as soon as you can doit with perfect convenience to yourself. 

 I am, Dear Sir, 



Yours, &c. 



WILLIAM LAX. 



VI. 



A Physical View of the Equatorial Regions, drawn up 

 from Measures taken and Observations made on the Spot, 

 from the tenth Degree of North to the tenth of South 

 Latitude, between the Years 1798 and 1804, $y Mr, 

 von Humboldt *. 



A HE author has here collected together the natural phe- Natural phen©- 

 nomena of the equinoctical regions, from the level of the™®£* ^ Sj V1 

 Pacific Ocean to the highest peak of the Andes. The par- equator. 

 ticulars, from which these results are given, will be found 

 in his travels at large; but this connected view of their 

 principal features cannot fail to be highly interesting to the 

 natural philosopher. Mr. von Humboldt has not extended These vary 

 this summary nearer the tropics than the latitude of 10°, poaching the 

 on account of the great difference observed, not only in the equinox. 

 productions of the soil, but more particularly in the me- 

 teorological phenomena, between 10° and 23°. 



* Magazin Encyclopedique, Sept. 1807, p. 139. 



JB b 2 From 



