Harriot, Thomas - Mss. 6785

275138

[Commentary:

For the edition of Apollonius used by Harriot see (Apollonius . ]

Mesographa
Heronis.
Philonis Bizantij.

Cum Annotatione nostra de
faciliori
[Translation: With my annotations for easier ]

where

a b

is
double to

b c

Note:
whether these
lines be

then

d h

would be parallel to

a c

& the problem performed nearly
and also other wayes &

Although Eutocius prefereth philo Bizantius his pratice of finding two
mean proportionalls Before that of Because the number being devided
into small æquall parts, it may now easily be seene when

h g

f c

be æquall,
then by often applying of the compasses to find

e f

e g

Yet in
my improvement the pratice would be better & more easy Let the figures
nombring the æquall parts beginne at

k

. & let their numeration runne towards

f

;
& the like from

k

towards

g

Then will the shape of a rectangle or gnomon
keepe

k e

always at rectangles with the ruler

f g

. and then and moving
the ruler with the gnomon keeping the poynt

c

also in the line till you find

k f

and

k g

æquall; then is that performed whi also which they now have
& [???] thus easier in practice because that æquallity is sooner found
because the figures go in both wayes a like, which in philoes practice cannot
be observed but with with as much difficulty almost, if not so much as
that of her

131 (66)	132 (66v)
133 (67)	134 (67v)
135 (68)	136 (68v)
137 (69)	138 (69v)
139 (70)	140 (70v)

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