Lafily, becaufc it is not poffible equally to adjuft thcfe 
two things with the numbers of the fliakings of the drum- 'tis 
ceceflary, that the foul^ defirous of the delight, in the earneft 
atteDtion to the found do invigorate her felfj and be bufy and 
intent about the outward drutn^drawingandrcftoringit from 
time to time^moreorlefs • thatfo the numbers of its Ihakings 
may anfwer to the alternations of the touches, and to the lo- 
garithms of the moft eafy numbers and parts that's pcffible : 
In the doing of which, (he learns the Tune which flie hears, 
and keeps it within her, and is glad to find hcrfclf moved by 
various affcftions, fomctimes to ftretchthe drum, fometimcs 
to relax ir^ otherwhile to leave it in its natural tenfion, with a 
certain ordfer, and for certain cads of the found, which in 
the Tune do occur to her. 
So far his Wjiory df Mufickj^ which being preffiiftd by himj 
h^givesug a vefy particular and minute Defcription of the 
Ear^C^i S&md^and of Hearings e\ptch\]y of the Hearing of 
two founds together 5 where occur many Theoremes , by him 
laid down as the chief Foundation of his whole work.Wbieh 
done, he treats of all forts of Mtijical Intervals ^ihtxx perfefti- 
on and Meafure 5 explicating this dodrine alfo by many Theo- 
rems^ and giving withal the Definitions of the Icvera! Inter- 
vals, and taking particular notice of fix forts of them, for 
which having found no names, he thought fit to borrow 
names for them from (7i;/^r/. 
mxt^ht difcourfes at large of the true Numbers of Sounds, . 
and of the various properties thence refultingfor Mufical In- 
tervals s all which he likcwife elucidates with divers confide^ 
rablc Theorems 5 fliewing withal, between what true num- 
bers of Sounds the^j^e^ie/ of each Interval is moft perfed^, 
and teachingjthat the rational Soul by her aftive and earneft 
attention gives the true number to the/r/2 Sound , that in the 
Ear is exhibited to her. 
Further.ht treats of Mufical C W/^then of Singing^zm the 
Modulation or Tune ; which latter he diftioguifhts from Sing- 
ing in general,by thisjhacitis fucb a kind of Song, as iropreN 
fes it fo ftrongly upon the Soul^. as to incline her to fiog it over 
and over again. Here, by the help of a table^ he fliews to have 
compofcd in order all the ^pmV/ of poffible Modulations or 
