MIGRATION. 263 



but the old, being wiser, throw them away*." Pen- 

 nant shrewdly remarks that " the good archbishop 

 did not want credulity," for " after having stocked 

 the bottoms of lakes with birds, he stores the clouds 

 with mice, which sometimes fall in plentiful showers 

 in Norway and the neighbouring countries f ." 



Etmuller, professor of Botany and Anatomy at 

 Leipsic, a century after Olaus, gives his personal 

 testimony to the circumstance. *' I remember," he 

 says, " to have found more than a bushel measure 

 (niedimnus) would hold of swallows closely clus- 

 tered among the reeds of a fish-pond under the ice, 

 all of them to appearance dead, but the heart still 

 pulsating J. 5 ' Our own excellent naturalist, Derham, 

 who quotes this, adds, <c We had, at a meeting of the 

 Royal Society, Feb. 12th, 1713, a farther confirma- 

 tion of swallows retiring under water in the winter, 

 from Dr. Colas, a person very curious in these mat- 

 ters, who, speaking of their way of fishing in the 

 northern parts by breaking holes and drawing their 

 nets under the ice, saith, that he saw sixteen swallows 

 so drawn out of the lake of Lamrodt, and about 

 thirty out of the king's great pond in Rosneilen ; 

 and that at Schlehitten, near a house of the Earl of 

 Dohna, he saw two swallows just come out of the 

 waters that could scarce stand, being very wet and 

 weak, with their wings hanging on the ground ; and 

 that he observed the swallows to be often weak for 

 some days after their appearance . )J 



Linnaeus, taking the matter as proved, expressly 

 says that 4t the chimney-swallow (Hirundo rmtica), 

 together with the window-swallow (H. urbica), de- 

 merges, and in spring emerges [| ;" and we find 

 from the dissertations read before the Academy of 



*Gent. Sept. Hist. xix.20 ; 12mo. Lugduni, 1652. 

 t Brit. Zool. ii. 352. J Dissert, ii. 10, 5. 



Physico-Theol. vii. note d. || Syst. Natures. 



2 c3 



