1831 



58-78 



40-30 



99-64 



. . 



1832 



50-25 



20-07 



78-20 



. . 



1833 



60-36 



36-99 



71-00 



1415 



1834 



6873 



40-17 



66-59 



36-85 



1835 



85-50 



37-26 



62-19 



27-70 



1836 



45-66 



47-59 



87-99 



35-00 



1837 



43-61 



49-27 



64-99 



10-55 



1838 



53-02 



54-33 



50-78 



20-31 



1835 



1837 



85-50 



43-66 



1835 



1837 



1000 



000 



314 Rain and Drought of the last Eight Seasons in India. [April, 



Calcutta, Madras, Bombay, Dehli, 

 inches. inches, inches, inches. 



To obtain the average varia- 

 tion, let us take the maximum 

 and minimum at each place, and 

 divide the whole difference be- 

 tween them into one thousand 



parts; then for the number itself substitute the proportional part 



of the difference. 



Thus at Calcutta we have 



These will by the proposed substitution become ., 

 and the whole will stand thus : — 



Calcutta. Madras. Bombay. Dehli. Average. 



It appears from this average 

 that the minimum has recurred 

 in five years, which is a period 

 somewhat shorter than we should 

 have been led to expect from 

 an examination of the prices of corn for many years back, 



I have before stated, as one of the results of such an examination, 

 that there was a more perfect recurrence at the end of fifty six years than 

 at any other period. Thus comparing together different years with that 

 interval between them, we have the following : — 



Maxim: or years) 1815 1822-23 1829 1835-36 



of abundance, j 1759 1767 1773 



Minim: or years) 1819-20 1826 1832 



of scarcity. } 1763 1770 1776 



In searching for data to elucidate this part of the subject, I obtained 

 sight of an old manuscript Register in the Surveyor General's Office, 

 from which I was enabled to compare the annual amounts of rain for 

 the last eight seasons with those fifty-six years before. The Register 

 appears to be imperfect, and, unfortunately, to have been kept by an 

 illiterate person. The daily entries begin towards the latter end of 

 1776, but, from a note we learn what had been the annual amount of 

 rain both in that year, and in the year previous. I here subjoin them, 

 and place by the side of each the depths registered 56 years afterwards. 



1831 



362 



295 



769 



. . 



475 



1832 



158 



000 



441 



, . 



200 — 



1833 



400 



246 



452 



137 



309 



1834 



600 



293 



401 



1000 



573 



1835 



1000 



250 



352 



652 



563 



1836 



050 



401 



635 



929 



504 



1837 



000 



425 



376 



000 



200 — 



1838 



225 



499 



216 



371 



328 



