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P

erfpeéti

VCE

altitudinis culn circulis

direél:~

viús , duca–

tur parallela

O T ,

hace dabit alcitudincm ar–

cumn radii diagonalium , per punéh

L T

G,

ducanrur arcus diagonales

&

perfcél:a erit ope–

l'atio,

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1

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PROPOSlTIO XIV,

Problema.

Fornicem polygom1m delineare,

Fíat primb ejus Ichnographia excitenturque

verticales linea: ACBD altirudinem fomicis de-

1:erminames ufque ad initium arcus, ducamur ra–

dii CF, DF, occucrentes lineis venicalibus in

pu~lt?

I,

&

K,

ducaturlinea CD, quac bifariam

dividarur in punGlo

E,

ex

quo ut centro, inter–

vallo EC ,'

aut

ED dcícribarur circulus in quot–

cumque volucr-is.Partes dividendus, formcturq\te

polygouum C G

H

D. Pariter dncarut linea

LM,

dividenda bifariam, fupra quam pariter defcriba-

tur ícmicirculus , ex punél:is G , H ducantur radü

GF,

HM,

íecames circulum mmorem, in

punllis

e

A

L, M,

.Perficia:ur~ue

polygonum

ILMK,

&

abro~

!uta

ent defcr1pt10.

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P R O P O S l T

I O

X

V,

Problema.

Cribiculum cllm caminú de/ineÍlre,

Sit prim?> delineandus camiaus in plano tabel–

la:

parallelo , ejus latitudo limul curo craffitie

• murornm, lignemur in linea terrac, fimquc

1

,1,

3, 4,

a

quibus ducamur radii ad pu11éh1m princi–

pale

E;

fignctur icem illius extra

murum~pro­

jeél:us, fitque

71.

ducarur radius

75'

a

punlto

difbntia:

Y

ducarur diagonalis

V

56

,

qt1z dabit

in radio :i.E , punétum

6,

per quod agenda paral–

lela

99

;

excitentur perpendiculares , íeu linea:

verticales ex punél:is

9, 9,

69,

&

perfeél:um crit

opus. Fuiffet quidem

&

nocandus coronidis pto–

jeél:us ;

fcd

operofum

cíl:

hace minora ornamenta

1

tninutatim perfequi.

Sic alius caminus in plano venicali ad tabel–

lam rc.¡\o delineanC!us. Ejus projeaio,

no~tuc

in

linea terr2, litque

AR,

per punél:um

R

agatur

ra–

dius RE. Di!hmia camini

a

punél:o extremo A,

lit

AC, CG mucomm craffities;

IG,

latitudo ca–

mini

K 1,

altera murorum crallities ; duaantur

diagonales C, GV,IV, KV ad punél:um dilhntia: .

V

fecances radium AE, in punél:is

F,H,L,M,

per

qua: agamur parallelac

FN, HO, LP MQ:

Exci–

tencur in punél:is

F,N,O, L,

P,

Q:

linez vertica–

les

&

abfolmum erit opus, excepta coronide quz

per fe Íatis imelligitur.

.

Si vero mumlis itmitatur camlnus, ut

ip

parte

finiíl:ra, eadem tamen praxis adhibemr, 6ngu_nrur

mmuli quafi pcrfeéti; ita eomm khnographta

&

balis in pavim«mo notcncur,

)

PRO

PO