A MISLEADING FALLACY 
59 
a puff, and thus perhaps the water above the nostril is displaced 
suddenly upward, forming a cloud of spray. Or again, if the air 
from this warm-blooded animal is projected into the cool morn¬ 
ing air, a vapour, similar to the breath of a human being on 
a frosty day, is formed. Then, as the beast suddenly raises its 
head, the water remaining on the exceptionally flat head, for the 
moment, streams down the sides. These phenomena combined 
may lead a superficial observer to erroneously conclude that the 
hippo is spouting. 
