156 



PEPPER TREE AS A CAUSE OF HAY FEVER. 



Table IV 



Exposure of Pollex Plates at Bloemfoxteix, October axd 

 November, 1910. 



Where only a single grain of a particular kind of pollen was 

 observed, this was not usually recorded. With this exception 

 the number of grains of pollen counted by direct examination 

 is recorded. The verbal estimate regarding the amount of 

 pollen records the impression left by an examination of the 

 centrifugal material. No stain was found whose use materially 

 facilitated the examination of the plates. 



