Of Musick.

1. First some \one/ sound must bee pitched upon, to w^ch all
y^e musick must bee more especially refered yⁿ to any
other sound, (as number to an unit) let this sound be
called y^e Cliffe or Key of y^e song.

2. Then consider [illeg] y^e sound w^ch is one or two or thre
8^ths above or below y^t key (for Musick seldome takes a
larger compasse yⁿ 3 8^ths) The cheife of [illeg] |w| ^ch is y^e
8^th next above y^e Key. 3.Each of these Eights are
alike divided into ꝑ [illeg] |t|s, t |f|or y^e ꝑ [illeg] |t|s of y^e higher eight
are [of] an Eight abo [illeg] |v|e their correspondent ꝑts [illeg] |o|f y^e
lower eight. so y^t y^e ꝑts of one Eight knowne give all y^e
rest, y^e other Eights being but a repetition of y^t . [illeg] |in| [illeg] | [a] |
more base or treble sound. (Hence s [illeg] |o|me call an 8^th y^e
largest consonant.) Let this division of an 8^th bee
called y^e Mode of y^e song.

4. This Eight i [illeg] |s| first divided into a 5^t & 4^th, y^e
fift being next above y^e Key; to w^ch it [illeg] adds so much
sweetnesse y^t should this fift bee omitted in any song, y^e
Key would [illeg] |i|mparte its name & nature [illeg] |t|o some sound
w ^{[illeg] |ch|} ha [illeg] |th| a fift above it. And since all ha [illeg] |r|mony
w ^{[illeg] |t|} hout a fi [illeg] |f|t is flat, therefore the key must necessa-
rily have a fift above i [illeg] |t|. ✝ < insertion from f 137v > ✝ here annex a discourse of y^e motion of strings sounding an 8^t
5^t & 4^th & of y^e Logarithmes of those strings, or distances of y^e notes.

5. An 8^th is next divided into a third major & 6^t
minor, & lastly into a 3^d minor & 6^t major. * < insertion from f 137v > * these are all y^e concords conteined in an Eight. Hereto
annex a discour [illeg] |se| of y^e 3^ds & 6^ts

The notes in order of concordance

Eight. 5^t. 3^d maj. 4^th. 6^t maj. 3^d min. 6^t min. 2^d maj. 7^th maj
7^th min. 2^d min. 5^t min. < text from f 138r resumes > But as too
suddaine a change from lesse to greater light offfends y^e
eye by reason y^t , y^e \spirits rarified by the/ augmented motion of y^e light too
violently stretch y^e optick nerve: soe y^e suddaine passing f [illeg] |r|om
grave to acute sounds is not so pleasant as if it were
done by degrees, for there \because/ of two [sic] greate a change of motion
made \thereby/ in the auditory spirits ♀.|✝| < insertion from f 137v > ✝ [illeg] |A|nd as a man \suddainely/ com̄ e |i|ng from greater to lesse light, cannot
discerne objects thereby so well, as when if he came to it by
degrees or as when hee hath staid some whi [illeg] |l|e in y^e lesser
light (by reason y^t y^e motion of y^e spirits in y^e optick nerve
caused by y^e greater \light/, doth, untill it bee allayed; [illeg] disturbe
\& as it were drowne/ y^e motion motion of y^e weaker light) soe if [illeg] |t|he slower motion
of y^e lower sound immediately succede y^e m [illeg] |uch| more smart
motion of y^e higher its impression [illeg] \on y^e auditory spirits — being then/ less perceptible, y^e
consonance \lower sound/ must bee [more] less pleasant y^t [had] if moved y^e step
had beene graduated, thus that coldness | warmth is \ [illeg] / pleasant to a hot | cold man
which is imperceptible to y^e same man cold | hot. Thus a little
[illeg] |h|eate is at y^e first un \ least /perceptible to one newly come
from a greater. Coroll: 1. The distance of sounds adds to
y^e imperfection of their concordance. Cor: 2: Tis better
to descend yⁿ ascend by [illeg] |le|apes y^e first makeing y^e
highest sound harsher, y^e seacond makeing y^e lower \one [illeg] |ly| / lesse
perceptible. < text from f 138r resumes > Which graduation may be thus don.

[illeg] |6|. The prime ꝑts of an 8^th are a 5^t & 4^th: of a 4^th
fift are a 3^d major & 3^d minor: w^ch two consist y^e
first of a tone major & tone minor, y^e 2^d of a tone major
[illeg] |&| semitone. A 4^th consists of a tone major, minor [illeg] |&| semitone. Soe y^t an eight consists of th [illeg] |r|e