EPISTOLIS

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18. Et pro area fegmenti Hyperbolici b£a ;

in dp cape md - & ad d 8c m erige

perpendicula oA mn occurrentia femicir-

culo fuper diametro ap defcripto : eritque

4 AN+Ab x 4.AV-BSA proxime: vel proximi-

AI ^-I-4Ai3 ^ ad - b ^a ; fi modo ca-

7 5 ^

-5

us, erit

TRAC-

Hiti c DB X ad

r S° pg r= (dg-dp~) r p -f —- x% ' *

350 /

lric fi modicus fit arcus ab, fatis erit fumpfifie re aequalem re£te |ap + ^HAD.

iiA ,^ lT jam curva ab Ellipfis, cujus axis ad litera d defignetur, parametur ap litera/, litera x-1Us arcus ab finum verfum defignante.

^cu s igi tur AEj f ive rC( q a AEj —flx T - 1—-

3 /i

- ^tXt +

2 d

<Pcr

fo

2

+ 4

5/i

7/i

—L.

— —iX-

s/y 2

1P\d 4

/'

+ 23

8</ 4

' 28 /^

/*

lbd 3

rrf iulam fupra traditam §. 5 .)

Sed

ir ;

e n aturi Ellipfeos,DB dx —« % |— p\«l- ^

'2 ° ae- db —

3/

JX L

s/ ;

3

spv

X

+ -±-5 7/i

£t_ b b

* 1 /' 3

X i -ii

2d

pl8 dP

x*

7 p?d2 3

28 /^

5

X z

n

16 d }

3 p\ x% spi

4

7/i9

+ _L _ 2 _

5/i^ 7/!^

2 3

38/^

CON-

STRUCT.

Mechanic.

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