CENTURY IX. 115 



to stir, but not to remove. And they get warm and 

 close places to sleep in. When the Flemings wintered 

 in Nova Zembla, 1 the bears about the middle of No 

 vember went to sleep ; and then the foxes began to 

 come forth, which durst not before. It is noted by 

 some of the ancients, that the she-bear breedeth, and 

 lieth in with her young, during that time of rest ; and 

 that a bear big with young hath seldom been seen. 2 



Experiment solitary touching the generating of creatures 

 by emulation and by putrefaction. 



900. Some living creatures are procreated by copu 

 lation between male and female ; some by putrefac 

 tion : and of those which come by putrefaction, many 

 do (nevertheless) afterwards procreate by copulation. 

 For the cause of both generations : first, it is most cer 

 tain that the cause of all vivification is a gentle and 

 proportionable heat, working upon a glutinous and 

 yielding substance : for the heat doth bring forth spirit 

 in that substance ; and the substance being glutinous 

 produceth two effects ; the one, that the spirit is de 

 tained, and cannot break forth ; the other, that the 

 matter being gentle and yielding, is driven forwards 

 by the motion of the spirits, after some swelling, into 

 shape and members. Therefore all sperm, all men- 

 struons substance, all matter whereof creatures are 

 produced by putrefaction, have evermore a closeness, 

 lentonr, and sequacity. It seemeth therefore, that the 

 generation by sperm only, and by putrefaction, have 



1 In 1596-97. The bears disappeared after sunset, but there was no 

 other reason for supposing that they became dormant. 



2 Arist. Hist. Animal, vi. 30., and viii. 17. 



