Sentence:  The "Sounds" that produce "Tones", are euer from ſuch "Bodies", as are in their Parts and Pores "Equall"; As well as the "Sounds" themſelues are "Equall"; And ſuch as are the "Percuſſions" of "Metall", as in "Bels"; Of "Glaſſe", as in the <WSD>Fillipping</WSD> of a "Drinking Glaſſe"; [...] 
Meaning of the word marked with <WSD> tags:  To strike, project, or propel with a fillip (that is, a finger released quickly after being pressed against the thumb); to flick.