156 



2. Estacion de los Ingleses 

 Level of the Sea 



3. Cueva de la Nieva 

 Level of the Sea 



4. Foot of the Sugar Loaf 

 Level of the Sea 



5. Top of the Peak 

 Level of the Sea 



inch. I'm. 



19 



9 81 



Th. 9" 



28 



3-72 



19i 



18 



8 93 





28 



3 51 



18f 



18 



3*89 





28 



3-51 



19-1 



so 



18 



Oil 





28 



372 



19J_ 



10 



• . ■ ■ ' j , ; ■ ■ i ;. ' ,iU ■ aiuui :n \ :. . -. - 



Mr. Varela finds, I know not after what formula, 534 



toises for the first station, 1 531 toises for the second station, 

 1780 toises for the third station, 1864 toises for the fourth 

 station, and 1940 for the fifth station. The small differences 

 which may be observed between the barometrical heights in- 

 dicated fyy the Spanish navigators, and those laid down by 

 Mr. de Borda, arise in a great measure from the one being 

 reduced to the level of the sea, while the others refer to the 

 height of the ground where stands Mr. Pasley's house. 



At the time of La Perouse's Voyage in 1785, Mr. La- 

 manon carried a barometer to the top of the Peak of Tene- 

 riffe. The observation of this naturalist*, calculated by 

 Mr. Von Zach, gives, by Mr. Deluc's method, 1856 toises ■ 

 by that of Sir G. Shuckburgh, 1893 toises, and by that of 

 Roy, 1889 toises. The result of the same barometric ob- 

 servation, according to Mr. Laplace's formula, is 1902 

 toises. v 



* See vol. i, p. 188. Zach. Journ. Astron., 1800, p. 

 396. We are surprised to see, that, at a time when the 

 useful labours of Deluc, Shuckburgh, and Tremblay, on the 

 barometric formulas, had long been known, the editor of La 



