^85 LECTURE VI. 



they live, except what takes place through 

 tubes or passages which she herself has 

 formed. Even in vegetables we observe 

 some surfaces besmeared with adhesive 

 wax, others varnished with resin, whilst 

 the grasses are glazed with transparent 

 flint. 



After the exhibition of the structures 

 already adverted to, Mr. Hunter calls our 

 attention to the fat of animals, which he 

 considers as not actually making a part of 

 the body, the animal being much the same 

 with or without it. We find his atten- 

 tion, however, excited by the great increase 

 of fat in hybernating animals, prior to their 

 becoming torpid; and there are contained 

 in his MS. many observations and experi- 

 ments which he requested his pupil. 

 Dr. Jenner, to make for him, relative to 

 this subject, in hedgehogs. 



The exterior coverings of animals are 

 next shown, which are to be considered as 

 their clothing or their armour, and re- 

 specting them, it seems worthy of remark. 



