Mr Cruckshanks 1 s Excursion from Lima to Pasco. Ill 



From these and the former observations of Mr Stewart, we 

 obtain the following results : 



1822, - - - 51.5 



1823, - - - 4 6.1 



1824, - - - 49.8 



1825, - - - 50.7 



1826, - - - 51.S 



1827, - - 49 



1828, .-- 50 



1829, 47 



1830, - - - 47.8 



Mean Temp, for 9 years, - - 49.24 



Correction in consequence of 9 h , and ll h , not being the 

 hours of Mean Temperature, - - — 0.84 



48.40 

 Mean Temperature according to Dr Brewster's for- 

 mula, .... —47.58 



Difference between the formula and observation, + 0.82 



It is curious to remark, that the mean temperature of the 

 four years, 1822-1825, inclusive, is precisely the same as that 

 of the nine years, 1822-1830, inclusive. 



Art. XIII. — Account of an Excursion from Lima to Pasco. 



In a Letter from Alexander Cruckshanks, Esq. to Dr 



Hooker. 

 This interesting letter, of which we propose to present an 

 abridgement to our readers, is published in Dr Hooker's Botani- 

 cal Miscellany, (Parts v. vi. p. 177-198, for March 1831,) 

 a valuable and instructive work, the botanical details of which 

 arc relieved and enlivened by much amusing personal narrative. 

 We must refer the botanical reader to the original letter for the 

 details, in which he will take the greatest interest. 



" Having determined to accompany my friend Mr M , 



an English merchant of Lima, who had been appointed Director 

 of a Company for draining the mines, we left the capital at noon 

 on the 21 st of June. < )ur party consisted of six individuals, and 



