70 



Centigrade Thermometer and West Longitude. 



Rodman, 

 Oct. and Nov. 

 1803. 



O 



o 



QO *0 



cm cm 

 jd bh 



^2 ° ^ 



CC o »0 +2 iO ° O 

 43 S & g | 



cc 



c6 |> 

 O Lj 



£ 



3 2 



9 1 



o 



V 



• o 

 OO CM 

 CM CM 



-c bh 





o ° ^ O 



CM o S ~ %$ 



H.S * §<S 



Humboldt, 

 June and July, 

 1799. 



• 



• 



• 



• 



« • 



i r " , ' 



• • 



• • 



Quevedo, 

 April and May, 

 1803. 



V 



to rt 



O CO 

 CM CO 





c ^ 



& O ^ o 



. v TO 0 1 



CO CM T" §> 

 Lh S3 o a q_ 



s 



oi CO 



a H 



CO 



o 



AO 



ZD CM 

 CM CM 



-a bh 





QO H CM 



r 



Cliappe, 

 Jan. and Feb. 

 1768. 



• • 



• ■ 



• • 



• • 



< 



• • 



• • 



• « 



M 



o 



to 



Maximum 



of the 

 temperature/ 



of the ' 



Ocean. 



