132 NATURAL HISTORY. 



light of the sun, the light of a glow-worm; the 

 report of an ordnance, the voice : The second, in 

 that an object of surcharge or excess destroyeth the 

 sense ; as the light of the sun the eye ; a violent 

 sound near the ear the hearing : The third, in that 

 both of them will be reverberate ; as in mirrors, and 

 in echoes. 



262. Neither of them doth destroy or hinder the 

 species of the other, although they encounter in the 

 same medium, as light or colour hinder not sound, 

 nor &quot; e contra.&quot; 



263. Both of them affect the sense in living 

 creatures, and yield objects of pleasure and dislike : 

 yet nevertheless the objects of them do also, if 

 it be well observed, affect and work upon dead 

 things ; namely, such as have some conformity 

 with the organs of the two senses, as visibles work 

 upon a looking-glass, which is like the pupil of the 

 eye ; and audibles upon the places of echo, which 

 resemble in some sort the cavern and structure of 

 the ear. 



264. Both of them do diversly work, as they 

 have their medium diversly disposed. So a trembling 

 medium, as smoke, maketh the object seem to trem 

 ble, and a rising or falling medium, as winds maketh 

 the sounds to rise or fall. 



265. To both, the medium, which is the most 

 propitious and conducible, is air, for glass or water, 

 &c. are not comparable. 



266. In both of them, where the object is fine 

 and accurate, it conduceth much to have the sense 

 intentive and erect, insomuch as you contract your 



