Nov., 1911.] Climatic Conditions and Plant Growth. 387 



It is unfortunate that no record of precipitation of moisture is 

 kept nearer Oxford than Cincinnati, 30 miles distant. However, 

 the figures kept there are valuable for our piu"pose and are given 

 below : 



Cincinnati does not fall within the area given by the govern- 

 ment reports as having a deficiency as high as 10 inches for the 

 year; but the precipitation for the year was only 27.29 inches, 

 which is, according to the figures of the government observations, 

 11.13 inches below the normal 38.42 inches for the station at 

 Cincinnati. The record of precipitation at Cincinnati for May 

 very probably exceeds ours, and ovir deficiency for the year was 

 almost certainly not less than 14 inches. Taking into account our 

 lack of rain in May and the table for Cincinnati, which shows a 

 deficiency of 13.80 inches for the last seven months of the year, it 

 will be seen that our deficiency for the last eight months of the 

 year was probably more than 16 inches. 



We shall want to compare climatic and vegetation conditions 

 for 1908 with those obtaining in 1909, and the precipitation 

 record for Cincinnati for 1909 is given below to be used in these 

 comparisons : 



The Record of Precipitation at Cincinnati for 1909. 

 January 2. .50 inches. Relation to normal precipitation — 0.8 inches. 



Excess for the year 



The figures for 1909 show the year to have been about normal 

 for total precipitation, but to have had an excess of 4.4 inches 

 for the four growing months, April, May, June and July. The 



