Magnitude af Sound, 45. In a Trunk, ib. The 

 Caufe thereof, ib. In an Hunters Horn big- 

 ger at the lower End, 38. The Caufe thereof: 

 ib . la a V tult under the Earth, ib.The Caufe 

 thereof, ib. In Hawks Bells, rather than 

 upon a piece of Brafje in the open Air y ib 



contained in chefe Centuries. 



' ' -J u " v w, iu. -ucr» sellers, lb 



In a Drum, ib. Further heard by Night, Motions of Sounds, 4?. They Move in round 

 than by Day, ib. The Caufe therenf. ib /„_ JK *vL . 17. C.a r • :i_ * 



rfw* ^D^ 5 ib. TheCaufe thereof, ib.'ln- 

 creajed by the Concurrent RefleBion, ib. 

 jfti^ £j ^ Sound-Board in Inftruments, 

 lb. In an Irifh Harp, ib. The Caufe of the 

 loud Sound thereof, ib. In a Virginal the 

 Lid Shut, ib. <z Concave within a wall, 

 ib. 38 , p. in a Bow-String, the Horn of 

 the Bow tatd to the Ear, ib. 39. The like in 

 a Rod of Iron, or Brafje, ib. The like convey- 

 ed by a Pillar of mod, from an Upper Cham- 

 ben to a Lower, ib. The like from the bottome 

 of a mil, ib. Fivewaies of Major ation of 

 Sounds, jb 

 Exility of Sounds through any porous Bodies, 

 lb. 39 Through water, ib. 40. Strings 

 topped jbort. ib> * Q 



Damping of Sounds, ib. with a Soft Body, ib 

 Iron hot notfo Sounding as Cold, ib. water 

 warm not fo founding in the rail as Cold, 



Loudneffe and Softnejje of Sounds differ fnm 

 Magnitude and Exility, 41. Loudneffe of 

 Sounds, lb. £uicknejje of Percuf ion Caufe 

 of the Loudnef. ib> 



Communication of Sounds. 4 [ 



Inequality of Sounds, ^.Unequal Sounds in- 

 grate, ib. Grateful!, ib. Mufical and Immu- 

 ftcal Sounds at pleafure only in Men , and 

 Birds, ib. Humming of Bees an unequal 

 Sound, 43. Metils quenched give an Hif- 

 fing Sound, & 



Bafe and Treble Sounds , ib. Two Caufes of Tre- 

 ble in Strings, ib. Proportion of the Air 

 percufjed, in T reble and Bafe, 5 3 . Trial here- 

 of to be made; in the winding up of a String, 

 ib.44. In the Distances of Frets, ib. In 

 the Bores of wind- Instruments. ' ib. 



Inter iour and Exteriour Sounds, 45, Their 

 Difference, ib. Several kinds of each 



Articulation of Sounds, 46. Articulate Sounds 

 in every part of the Air, ib. winds hinde 



found, ib. Confounded in a Room over an 



arched Vault, ib. Motions of the Inffru- 

 menis of Speech towards the Forming of the 

 Letters, ib. Instruments of Voyce which 

 they are, ib. 46,47 . Inarticulate hyces.and 

 Inanimate Sounds,have a Similitude with di- 

 vers Letters, ib 



.. J f ' - "'J' 



ib. May move in an arched Line, ib. Sup - 

 pofed that Sounds move better down- 

 wards , than upwards, ib. <,o.Tryalofit.\ 



ibJ 



Lasting of Sounds, ib. Sounds continue not, 

 but renew, ib. Great Sounds heard at far 

 Diftance, ib. Not in the Infant of the 

 Sound, but Long after, ib. OhjeB of 'Sight 

 quicker than Sound, 50,51. Sounds Vanity 

 by degrees, which the Ob/eBs of Sight do not, 

 ib. The Caufe thereof. y b . 



Pafjage of Sounds through other Bodies ,51. 

 The Body intercepting mull not be very 

 thick , ib. The Spirits of the Body inter- 

 cepting, whether they.co-operate in the Souzd, 

 ib. Sound not heard in a long down-right 

 Arch, ib. Pafjeth eafily throwjj Foraminoits 

 Bodies, ib. whether diminifhed in the I af- 

 f age through f mall Crannies . 5 2 



Medium of Sounds, ib. Air the belt Medium, 

 ib. Thin Air not fo good as thick Air, ib. 

 Whether Flame aft Medium, ib. whetier 0- 

 ther Liquors be fide Water. ib. 

 Figures of the different* of Sounds , 52. Seve- 

 ral Try als of them, ib. 

 Mixtures of Sounds, 5 3 . Audibles mingle in the 

 Medium , which Vifbles do net, ib. The 

 Caufe thereof, ib. Mixture without iiftin- 

 Bion makes the be ft Harmon), ib. Quali- 

 ties in the Air have no Operations upon 

 Sounds, ib. Sounds in the Air alter one ano- 

 ther, 54. Two Sounds of like Loudnef, will 

 not be heard as far again, as one, ib. The 

 Caufe thereof ib. 

 Melioration of Sounds, 5 5 . Policed Bodies cre- 

 ating Sounds, Meliorate them, ib. wet on the 

 In fide of a Pipe doth the like, ib. Trolly 

 Weather caufeth the fame, ib. Mi noting of ^ 

 Open Air , with Pent Air, doth the s ame, ib. 

 From a Body equal Sound better, 5 5 . Inten- 

 fion of the Senfe of Hearing meliorateth 

 them. ib 



1 . ■ J . . ' * mnuer wem. jb 



not the Articulation, lb. Diffancehindreth, Imitation of Sounds , ib. The wonder thereof 

 lb. Speaking under Water hindreth it not ' 1 



-rr T "'& "»~" wmcf mnarein it not, in Children, and Birds. ib 

 f^on requireth a Mediocrity of RefleBion of Sounds, 5*. The fever al kinds, 



ib. No RefraBton in Sounds obferved.^ 

 _ J T Sympd- 



