fliewcd tofomeof our Muficians about three years fince ; and 
after him by lAx. Thomas Pigof^ a Batche^our of Arts, and Fellow 
of Wadham-Qlledgs who, giving notice of it to fame others, 
faundj that (unkoovvn tohim) the fame had been formerly ta- 
ken notice of by Mr^ Noh/e , and (upon notice from him) by 
ochers : and it is now commonly known to our Muficians here^ 
I add this further, ( which I took notice of upon occafion of 
making trial of the other, ) that the fame firing, ascty, being 
ftruck in themidft at /3, (each pan being uoifon to the other,) 
will give DO clear Sound ac all 5 but very confufed. And not 
only fo ^which others alfo have obferved, that a firing doth 
not found clear if ftruck m the midft but alfo, if be 
ft ruck at ^ or where one part is anOfiave to the other ; and 
in like manner, if ct « be ftruck at iS or 5 the one part beicg a 
double Oftave to the other. And fo if be ftruck in ^or / ; 
y ^ 
the one part being a Fifth to the other , and fo in other like 
eonfonantdivifions : But ftill the lefs remarkable as the num- 
ber of divifions increafeth. This and the former I ;udgeto 
depend upon one and the fame cau(e 5 viz. the contemporary 
vibrations of the feveral Unifon parts, which make the one 
tremble at the motion of the other : But when ftruck at the 
refpeftive points of divifions, the found is incongruous , by 
reafon that the point is difturbed which fliould be at reft. 
Poftfcript. 
ALute'-ftring or Viol^ftring mil thus anjmr , mt only to m 
confomnt firing on the fame or a neighbouring Lute or Viol 5 
lut to aconfonant Note in Wind-lnftruments : which was parti- 
€uUrly tried on a Viol , anfwering to the confonant Notes on a 
Chamber-Organ i very remarkably : But mt jo remarkably, to the 
Wireftrings of an Harpjichord, Which, whet her it were becaufe 
of the different texture in Metal-firings from that of Gut* 
firings \ or {which I rather think) becaufe the Metal firings, 
though they give to the Air as fmart a fir oaky yet not fo diffu^ve as 
the other ; / lifi not to difpute. But Wind-lnfiruments give to 
the Air as communicative a concuffion^ if not more^ than that of 
Gut'fitings. Andwe feel the IVainfcot- feats, on which we fit or 
lean^ to tremble confiantly at certain Notes on the Organ or other 
5S 2 Wind' 
