152 



TRANSACTIONS OP THE 



YEARLY AND SEASONAL RAINFALL, ETC. 



The instructive tabulated information below gives the rainfall 

 annually — that is, from January to December of each year — for 

 thirty-one years. Also, the rainfall by seasons, beginning with Sep- 

 tember 1st of one year and ending with August 31st of the next year, 

 the wettest season being 1861-2 — 35.56 inches; the driest that of 

 1863-4—7.86 inches; the wettest calendar year being 1880—31.99 

 inches; the driest being 1877 — 8.43 inches; the mean average sea- 

 sonal rainfall for thirty years being 18.958 inches; the mean average 

 for the year, or the mean annual average, being 18.978 inches. The 

 difference between the mean average rainfall, calculating from Janu- 

 ary 1st to December 31st of each year, and from September 1st of one 

 year to August 31st of next year, is only .020 of an inch in favor of 

 the calendar year: 



* MeaQ for thirty-one years, 

 t Mean for thirty seasons. 



