Page:Encyclopædia Britannica, Ninth Edition, v. 22.djvu/792

Rh 

 SWEET POTATO. See.  SWIFT, a bird so called from the extreme speed of its flight, which apparently exceeds that of any other British species, the Hirundo apus of Linnaeus and Cypselus apus or murarius of modern ornithologists, who have at last learned that it has only an outward resemblance but no near affinity to the (ante, p. 729) or its allies. Well known as a summer-visitor throughout the greater part of Europe, it is one of the latest to return from Africa, and its stay in the country of its birth is of the shortest, for it generally disappears from England very early in August, though occasionally to be seen for even two months later.

