CENTURY III. 131 



and fill a whole floor or orb unto certain limits ; and 

 are carried a great way : and do languish and lessen 

 by degrees, according to the distance of the objects 

 from the sensories. 



256. Both of them have the whole species in 

 every small portion of the air, or medium, so as the 

 species do pass through small crannies without con 

 fusion : as we see ordinarily in levels, as to the eye ; 

 and in crannies or chinks, as to the sound. 



257. Both of them are of a sudden and easy 

 generation and delation ; and likewise perish swiftly 

 and suddenly ; as if you remove the light, or touch 

 the bodies that give the sound. 



258. Both of them do receive and carry exqui 

 site and accurate differences ; as of colours, figures, 

 motions, distances, in visibles ; and of articulate 

 voices, tones, songs, and quaverings, in audibles. 



259. Both of them, in their virtue and working, 

 do not appear to emit any corporal substance into 

 their mediums, or the orb of their virtue ; neither 

 again to rise or stir any evident local motion in 

 their mediums as they pass ; but only to carry cer 

 tain spiritual species ; the perfect knowledge of the 

 cause whereof, being hitherto scarcely attained, we 

 shall search and handle in due place. 



260. Both of them seem not to generate or pro 

 duce any other effect in nature, but such as apper- 

 taineth to their proper objects ^and senses, and are 

 otherwise barren. 



261. But both of them, in their own proper 

 action, do work three manifest effects. The first, in 

 that the stronger species drowneth the lesser ; as the 



