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588000000 yards (for ſo many are in 56 diameters of the Earth)

be paſſed? The rule for this work is, that the third number muſt

be multiplied by the ſquare of the ſecond, of which doth come

14700000000, which ought to be divided by the firſt, that is, by

100, and the root ſquare of the quotient, that is, 12124 is the

number ſought, namely 12124 min. ſecun. of an hour, which are

3 hours, 22 min. prim. and 4 ſeconds.

be paſſed? The rule for this work is, that the third number muſt

be multiplied by the ſquare of the ſecond, of which doth come

14700000000, which ought to be divided by the firſt, that is, by

100, and the root ſquare of the quotient, that is, 12124 is the

number ſought, namely 12124 min. ſecun. of an hour, which are

3 hours, 22 min. prim. and 4 ſeconds.

SAGR. I have ſeen the working, but I know nothing of the

reaſon for ſo working, nor do I now think it a time to ask it.

reaſon for ſo working, nor do I now think it a time to ask it.

SALV. Yet I will give it, though you do not ask it, becauſe it

is very eaſie. Let us mark theſe three numbers with the Letters

A firſt, B ſecond, C

[Figure 8]

third. A and C are the

numbers of the ſpaces,

B is the number of the

time; the fourth number

is ſought, of the time

alſo. And becauſe we

know, that look what

proportion the ſpace A,

hath to the ſpuace C, the

ſame proportion ſhall the

ſquare of the time B

have to the ſqare of the

time, which is ſought.

Therefore by the Golden Rule, let the number C be multi

plied by the ſquare of the number B, and let the product be di

vided by the number A, and the quotient ſhall be the ſquare of

the number ſought, and its ſquare root ſhall be the number it ſelf

that is ſought. Now you ſee how eaſie it is to be underſtood.

is very eaſie. Let us mark theſe three numbers with the Letters

A firſt, B ſecond, C

[Figure 8]

third. A and C are the

numbers of the ſpaces,

B is the number of the

time; the fourth number

is ſought, of the time

alſo. And becauſe we

know, that look what

proportion the ſpace A,

hath to the ſpuace C, the

ſame proportion ſhall the

ſquare of the time B

have to the ſqare of the

time, which is ſought.

Therefore by the Golden Rule, let the number C be multi

plied by the ſquare of the number B, and let the product be di

vided by the number A, and the quotient ſhall be the ſquare of

the number ſought, and its ſquare root ſhall be the number it ſelf

that is ſought. Now you ſee how eaſie it is to be underſtood.

SAGR. So are all truths, when once they are found out, but the

difficulty lyeth in finding them. I very well apprehend it, and kindly

thank you. And if there remain any other curioſity touching this

point, I pray you let us hear it; for if I may ſpeak my mind, I

will with the favour of Simplicius, that from your diſcourſes I al

wayes learn ſome new motion, but from thoſe of his Philoſo

phers, I do not remember that I have learn't any thing of mo

ment.

difficulty lyeth in finding them. I very well apprehend it, and kindly

thank you. And if there remain any other curioſity touching this

point, I pray you let us hear it; for if I may ſpeak my mind, I

will with the favour of Simplicius, that from your diſcourſes I al

wayes learn ſome new motion, but from thoſe of his Philoſo

phers, I do not remember that I have learn't any thing of mo

ment.

SALV. There might be much more ſaid touching theſe local

motions; but according to agreement, we will reſerve it to a par

ticular conference, and for the preſent I will ſpeak ſomething

touching the Author named by Simplicius, who thinketh he hath

given a great advantage to the adverſe party in granting that, that

Canon bullet in falling from the concave of the Moon may de

ſcend with a velocity equal to the velocity wherewith it would

motions; but according to agreement, we will reſerve it to a par

ticular conference, and for the preſent I will ſpeak ſomething

touching the Author named by Simplicius, who thinketh he hath

given a great advantage to the adverſe party in granting that, that

Canon bullet in falling from the concave of the Moon may de

ſcend with a velocity equal to the velocity wherewith it would