350 



Table III. — Barha(l0)< siifjar crop and rainfall of preceding yen) 



Note. — In calculating the average crop and the respective annual excesses or deficits 

 given in Tables I and III Governor Rawson says that " he has made an arbitrary division 

 of the whole period into two sections marked by the introduction of the use of guano 

 as a fertilizer." For the first section, 1847-1856, inclusive, he considers 38,795 hogsheads 

 as the average, but for the second section, 1857-1872, inclusive, he takes 45,036 hogsheads 

 as the average. He states that this is virtually assuming that duriug the whole period 

 climatic and other conditions were nearly constant and that the principal difference was 

 in the introduction of the use of guano and the great increase of crops was due to that. 

 During the first interval an inch of rain corresponded to 642 hogsheads of sugar in the 

 crop of the next year, but during the second interval it corresponded to 800 hogsheac"^. 



