CHAP. III.] 



EAIX. 



43 



on the tree, being full of white worms. The quantity of rain 

 which fell in the seven years from 1747 to 1753 inclusive, 

 amounts to 214-346 inches. Therefore the mean quantity 

 for each year is 3062." 



Dr. Mason's Observations give the following quantities for 

 1834, 1835: — 



Great inequalities, however, subsist between one year and 

 another at Madeira in the distribution of the rain through 

 the seasons, though the general average does not much differ. 

 The amount of that which falls in the mountains is unknown. 

 In comparing the climate with those of more northern lati- 

 tudes it must be remembered that the frequency of the rain 

 here bears no proportion to its amount ; Dr. Macaulay has 

 computed that whilst it rains in London 178 days in the 



