Do the Mining Operations affect the Climate of Kimberley ? 17 
worth. It must not be inferred, however, that the numbers given 
in these tables show absolutely by how much the maximum tem- 
peratures are modified by particular winds; that could only be 
determined if we knew what would be the temperatures if the floors 
did not exist. Not only that, but the iron roofs of the houses are 
much more liberally distributed in Kimberley than they are in 
Kenilworth, and this must also exert some influence. Yet consider- 
ing how largely secondary influences enter into and disturb normal 
meteorological phenomena, it is perhaps surprising that the final 
results should develop with so much regularity. 
