378 THE LITERATURE OF THIS SUBJECT 



Swallows is extensive, and some of it is very curious. In order 

 that tlie reader may avail himself of all the sources of infor- 

 mation I possess, and form his own conclusions, I present him 

 with such portion of the bibliography of the subject as I happen 

 to have already compiled. Having at present writing only 

 about half finished my " Bibliography of Oi-nithology ", I sup- 

 pose there may be extant about twice as many articles on the 

 subject as are here given. Most of these titles relate merely to 

 irregularities observed in the ordinary migrations of Swallows 

 in England ; but there is a fair sprinkling of references to the 

 particular crux of hibernation. The most wary or the most 

 timid student may bo assured that he will fiud himself in per- 

 fectly respectable company whichever side of the fence he may 

 fall on. The notes which I have appended in many eases sup- 

 port my assertions regarding the character of the evidence we 

 possess, and warrant my statement that the allegations, respect- 

 ing which ornithologists must sooner or later come to some 

 understanding, are well attested. For the rest, I may add, 

 that I will not ignore, do not deny, and can not vouch for the 

 statements of authors. 



1630. ScHWALBACH, J. G. " Dissertatio de Ciconiis, Gruibns, et Hirundinibus, 

 eorumque Hybernaoulis. Spirae, 1630. 4to. pp. 28." 

 Not seen — otJiers quote the title differently. 



1658. Thomasius, J. Dissertatio de Hibernaculis Hlrundinum. Thoma- 

 sius, J., praes. resp. Chr. Schmidiclien. 4to. Lipsise, 1658 ; 1671 ; 

 1702, pp. 32. — Deutsche Uebers., Von der Sohwalben Winterquartier. 

 8vo. Dresden, 1702. 

 Not seeD— Bobm, Bibl. ii. i. p. 52I.J Title compiled from different soarces. 



1666. SCHEFFERUS, J. [" That it is most certain, that Swallows sink them- 

 selves towards Autnmne into Lakes, no otherwise than Frogs ; " etc.] 

 < PMlos. Trans, i. 1666, p. 350. 



1702. GoEDiNG, A. "Diss. phil. brevem exhibens descriptionem Abitus 

 Domiciliique hibernalis Hirundiuum ; Prses. And. Goeding, Eesp. E. 

 Aurelius, Dalek. Upsalise, 1702. 8vo. pp. 4, 52." 

 Not seen — title taken from v. Friesen. 



1761. COLLINSON, P. A Letter to the Honourable J. Th. Klein, Secretary to 

 the City of Dantzick, from Mr. Peter CoUinson, F. E. S. concerning 

 the Migration of Swallows. < Philoa. Trans, for 1760, li. pt. ii. 1761, 

 pp. 459-464. 

 Kefnting tlie notion of torpid hibernation. 



1764. ACHAKD, F. C. Remarks on Swallows on the Rhine. <^ PMlos. 

 Trans, for 1763, llii. 1764, pp. 101, 102. 



Statement of their being found in holes in a sandy cliff; they " seemed stiff 

 and lifeless ", but subsequently revived. 



