( ^<^i^ ) 
Pipes that are 2ible to produce fuch motioos j Since bur mo; 
dern Artificers, in his opinion, do fail not only in the matter, 
of which thofe inftruments are to be made, butalfo in the 
proportioDj^ which is to be obferved in their form Forafmuch 
as 'tis now commonly thought, that, there being two 7r^/> of 
the fame length, but of different thicknefs, the thicker of the 
two will yield a graver found than the flendercr 5 which he 
faith^ is contrary to Experiment ^ by which he alledges to have 
found , that the thicker the tibi£ are , the acuter found they 
yield, and the flenderer,thc graver, provided you keep the 
lame length. Where he undertaketh to correft and 
£>^i-f^^/e/ concerning this particular. He concludes all with 
thisadmonition^thatif any havca mind to reftore the Anticnt 
Mufickj or to redify the Modern, he muft by all means imi- 
tate the diligence of th^ Antients in reducing all lyllables to a 
certain quantiiy y and in reftoring Metrical Feet, which , 
Je fiith^iht Modern Mufick is almoft altogether deftitute of 
LONDON, 
'fintcd for Jd» Mmin^ Printer to the Reyal Society. l6j^. 
