94 NATURAL HISTORY. 



still the tone remained : but the bottom of it was 

 set against a woollen carpet ; a lining of plush ; a 

 lock of wool, though loosely put in ; against snow ; 

 and the sound of it was quite deaded, and but breath. 



160. Iron hot produceth not so full a sound as 

 when it is cold, for while it is hot, it appeareth to 

 be more soft and less resounding. So likewise warm 

 water, when it falleth, maketh not so full a sound as 

 cold, and I conceive it is softer, and nearer the nature 

 of oil, for it is more slippery, as may be perceived in 

 that it scowreth better. 



161. Let there be a recorder made with two 

 fipples, at each end one: the trunk of it of the 

 length of two recorders, and the holes answerable 

 towards each end, and let two play the same lesson 

 upon it at an unison ; and let it be noted whether 

 the sound be confounded, or amplified, or dulled. 

 So likewise let a cross be made of two trunks, 

 throughout, hollow, and let two speak, or sing, the 

 one longways, the other traverse : and let two hear 

 at the opposite ends, and note whether the sound be 

 confounded, amplified, or dulled. Which two 

 instances will also give light to the mixture of 

 sounds, whereof we shall speak hereafter. 



162. A bellows blown in at the hole of a drum, 

 and the drum then strucken, maketh the sound a 

 little flatter, but no other apparent alteration. The 

 cause is manifest : partly for that it hindereth the 

 issue of the sound, and partly for that it maketh the 

 air, being blown together, less moveable. 



