164 



PEPPEll TREE AS A CAUSE OF HAY FEVER. 



Second Street. — This is in the central part of the town, and 

 pepper trees are fairly plentiful in the neighbourhood. This site 

 was chosen because it was the residence of two patients who 

 were suffering from hay fever. The plates were hung on the 

 stoep. The pepper tree nearest to the plates was 35 paces dis- 

 tant and to the east (that is, the leeward with reference to the 

 prevailing wind). The nearest pepper trees in other directions 

 VA'ere much further off. It will be noticed from the Table that 

 of eight plates suspended here, pepper tree pollen was found en 

 seven, and no other pollen on any. 



Table IX 



Meteorological Obseuv.\tions : Bloemfoxteix, November axd 



December, 1920. 



