I, ANIMALCULA OF INFUSIONS, 79 



This experiment, which is mentioned in my An- 

 notations 



124 minutes, the thermometer ftood at 9°; they were ver)-- 

 feeble, but kept their eyes open : they moved when touch- 

 ed, and endeavoured to elcape. The thermometer fell no 

 more. In 60 minutes, fome figns of animation vvere in- 

 dicated by two, but the others appeared dead. However, 

 this was only afphixy, for the heat of the atmofphere re- 

 animated them, and in 68 minutes they had recovered 

 their natural vivacity. 



' Of two fwallows expofed to i*^, one died in ten, the 

 other in fifteen minutes. 



' Two window fwallows (hirundo urbica) expofed to 2^ 

 and 3° of cold, died in 2 1 and 40 minutes. 



* Six martins (hirundo apus) were expofed to 8° for three 

 hours. The firft hour they were reftlefs ; the fecond their 

 Xnotlons lefs frequent ; the third they feemed motionlefs 

 though without lethargy. Their eyes were open, and 

 they moved on being touched. Expofed to the atmof- 

 phere at 74°, they recovered. 



' In another experiment with the fame martins, the 

 thermometer fell to 3^ ; one died in fix minutes, two more 

 in twenty-five ; the other three appeared d;?d, but reviv- 

 ed on expofure to the atmofphere an hour : however, they 

 died irrecoverably when returned to the veilel ten minutes 

 lon^rer. 



* Some naturalifts think, that the bank fwallow [hiruiuio 

 riparia) conceals itfelf in holes during winter ; and the er- 

 roj- afcribing the fums to windov,' fwallows, arifes from 



confo undine: 



