394 NATURAL HISTORY. 



746. Sleep nourisheth, or at least preserveth bo 

 dies, a long time, without other nourishment. Beasts 

 that sleep in winter, as it is noted of wild bears, 

 during their sleep wax very fat, though they eat no 

 thing. Bats have been found in ovens, and other hol 

 low close places, matted one upon another : and there 

 fore it is likely that they sleep in the winter time, 

 and eat nothing. Query, whether bees do not sleep 

 all winter, and spare their honey ? Butterflies, and 

 other flies, do not only sleep, but lie as dead all win 

 ter ; and yet with a little heat of sun or fire, revive 

 again. A dormouse, both winter and summer, will 

 sleep some days together, and eat nothing. 



Experiments in consort touching teeth and hard sub 

 stances in the bodies of living creatures. 

 To restore teeth in age, were magnale naturae. It 

 may be thought of. But howsoever, the nature of 

 the teeth deserveth to be inquired of, as well as the 

 other parts of living creatures bodies. 



747. There be five parts in the bodies of living 

 creatures, that are of hard substance ; the skull, the 

 teeth, the bones, the horns,- and the nails. The 

 greatest quantity of hard substance continued is to 

 wards the head. For there is the skull of one intire 

 bone ; there are the teeth, ; there are the maxillary 

 bones ; there is the hard bone that is the instrument 

 of hearing ; and thence issue the horns ; so that the 

 building of living creatures bodies is like the building 

 of a timber house, where the walls and other parts 

 have columns and beams ; but the roof is, in the bet- 



