PEPPER TREE AS A CAUSE OF HAY FEVER. 



159 



During the hay fever epidemic of 1919 at Bloemfontein, some 

 47 pollen plates were exposed on 30 days between October 15 

 and November 29. Particulars are given in Table IV, and the 

 results may be summarised as follows : — 



Number of pollen plates exposed 47 



Number of plates on which no pollen was found 20 



pollen of some kind was found ... 27 



pepper tree pollen was found ... 23 

 " " ])ollen other than that of the 



pepper tree was found 11 



The outstanding features shown in the table are the frequency 

 and amount of both dust and pepper tree pollen and the scarcity 

 of other pollens both as regards varieties and amount. 



Tadle VI 

 ]\Ieteorological Observations : Bloemfoxteix, November, 1919. 



