320 NATURAL HISTORY 



the 4th, the swift on April the 24th, the 

 bank-martin on April the 12th, and the 

 house-martin not till April the 30th. At 

 South Zelcy Devonshire, swallows did not 

 arrive till April the 25th ; swifts, in plenty, 

 on J^Iay the 1st ; and house-martins not till 

 the middle of May. At Blackburn in Lan- 

 cashire, swifts were seen April the 28th, 

 swallows April the 29th, house-martins, 

 Mat/ the 1st. Do these different dates in 

 such distant districts, prove any thing for 

 or against migration ? 



A farmer, near Wci/hill, fallows his land 

 with two teams of asses ; one of which 

 works till noon, and the other in the after- 

 noon. When these animals have done their 

 work, tliey are penned all night, like sheep, 

 on the fallow. In the Winter they are con- 

 fined and foddered in a yard, and make 

 plenty of dung. 



Linnccus says, that hawks " paciscuntur 

 inducias cum arihns, (piamdiu cucfilus cucu- 

 Idl ; " but it appears to me that, during that 

 period, many little birds are taken and 

 destroyed by birds of prey, as may be seen 



