44 



J 



Table II. gives the mean temperature for each separate month in 

 the fifteen years, also the means for every year, and for each month, 

 collectively. For the purpose of comparison, there is added under the 

 mean temperature for each month similar means for the neighbourhood 

 of London, and for the Royal Observatory, Greenwich. As there is 

 considerable discrepancy between these two, I may state that I have 

 taken the former from Mr. Glaisher's "Tables of Corrections to be applied 

 to Meteorological Instruments," (1850); and the latter from Drew's 

 "Practical Meterology," (second edition, i860). It will be observed that the 

 summer months. May, June, July, and August, have a higher mean 

 temperature assigned to them on the authority of Drew, than on that 

 of Mr. Glaisher, whilst the remaining eight months are much lower. 



I cannot determine which of these two is the more rehable, but 

 whichever is correct, the result of the comparison is the same in /cmii, 

 although it differs in degree, viz:— that the mean temperature of the 

 winter months is higher, whilst that of the summer is lower at Cocker- 



