xxxii PJii/sical and Geopiostic Suggestions, 



it was 12°-8 Reaumur (60!'8 Falir.). The temperature ob- 

 served in the course of twenty years by Mr. Dirckinck von 

 Holmfeld, in the neighbourhood of Callao, expressed in 

 degrees of Reaumur^ were as follows : — 



September 1802 .... 12°-8 (Falir. 6 0° -8) 1 ^^^^^„^^^^^ .„ ^,^ ^j^_ 



November „ .... 12°-4 ( ,, 59°-9) > 13°-3 Reaumur. 



December, end of . . . . 16°-8 ( ,, 69°-8)3 



[ January 1825 12°-7 ( „ 60°-57) 



February ,, 15°-3 ( „ 66°-42) 



March ,, 15°-7 ( ,, 67°-32) 



AprU „ 14°-5 ( „ 64°-62) 



The temperature of the sea I found to be 22° Reaumur 

 (81° 5 Fah.) north of Cape Blanco, when on my way from 

 Callao de Lima, at which point the cold current diverged 

 towards the Gallipagos. 



Between the Gulfs of Guayaquil and Panama, north-east of 

 the cold current, the temperature of the sea during the month 

 of April rose as high as 24° 5', (87° 12' Fahr.). Within 

 the range of the current, Mr. Dirckinck had carried on 

 his observations in compliance with my instructions, by 

 means of thermometers that had been compared by Arago. 

 Everywhere in the current, in December 1824, he found 

 from 16° to 18° (68° to 72°'5 Fahr.); between Quilca and 

 Callao, in January, 1825, from 18° to 19° (72° 5' to 74° 75' 

 Fahr.); between Chorillos, near Lima (Lat. 12° 39' S.) and 

 Valparaiso, in August, 1825, from 13° 8' to 10° 5' (63°-05 to 

 5° 62' Fahr.) ; between Chorillos and San Carlos de Chiloe, 

 in June, 1825, from 18° 8' to 9° 2' (74° 3' to 52° 7'). 



