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lioer

í

I

t.

5'

~

f

nartdi apparerltiam

ptm.éi

:i in plano _horiz?ncali

cui cabella inftfti

c, ex1f

lenns,

praxu~

fac1e_mus

univerfaliorem, nempe cujufcmnque puné\:1 cu–

jus decenninaca fic diíl:antia

a

tabella, diíl:anti• ad

J:rvam '

211[

dcxcram

a

plano vcrricali' pcr

~llll~um

principale,

&

peroculutn tranfeume; 1mn

K

.B

diílamia

a

plano horizonrali cui rabella inrtflir

Ñam hz d!íl:anriz íufficienter pun61:um aliquod

cerrum,

&

dctcrminamm indicant.

Sic ergo ptimo e)us alrirudo trium

p~dum.

Sir

ergo linea AB diíl:ans ,

a

linea rerrz:

CL,

tribus

pedibus. Sic item ad dexrcram verticalis princi–

palis repnrfencari per lineam

EF

duobus pedibus,

lit

igicur

GH

duorum pedum, ducacur rad1us

HE,

ter~io

fir

diíl:ans

a

rabell1 pedibus quinque,

tia~

lin~a

AH pedum quinl¡ue;& ducatbr linb dia ·

0 :

nahs AK, ad punll:u_m dtfiaotia: K, fecans

radi~m

HE ,

m

punll:o 1; dtco punéhim

¡

ffi

· ,

tiam punll:i propoÚti. Fingatur eni::

h~;i~i::rea~~

planum '.

dtíl:an~

plano cui infií\it tabella'

t~i­

bus

ped1~11s

!

11l1us c_ommunis, fcfl:io

ene

linea.

ABI qua

e.e

fi

111

co

honzo_nc~li

phno tipcmnur, ur

(

propofi:•o

18.

f.r<c~de'.JllS

l1bYi)

pra:fmbit inve–

n1ecur e¡us apparcnua 111 plmél:o

l.

Alii vero qui furtr ita arfuet1 plano horizonta\i

cui tabella inliílit,

lit

in alio operad nefc\anc; iti

id cxequuncur, prim? lineam

FL,

a:qualcm acci–

pium di!Íantia: pun_él:i propofiti,

a

plano

ver~ica­

li primario ; fecundo , duél:o radio

L E ,

lincani

LC,

f.cium a:qualem diílanriz ejus,

a

tabella¡

duéláquc

dia~onali

C K ;

fecame radium

L E ,

ir:i

punél:o

O,

habent apparemiam, ptmél:i pcrpe!'di–

culariter.fup¡foliti, in

pun~tis

9

,,&

L,

cxcir~nr

perpendiculares

01, Lk,

&

LH

qu1dem rrium

pedum, ut fupponimr cale punétum clcvarum rri–

b~s pedibu~,

duClóque radio

HE,

fecarire perpen

7

d1cularem

O

1

10 punéto

1 ,

habcnr apparenriam

qu:diram. Alii per triangulum ad latera defcrip–

tum,

&

per patallelas , uc dbcuimus rorum nego-

rium abfolvtlnc.

~#,rlf,~~rlf,'*'~"',t,rf,,it,'*'rlf,~rlf,;f,#,'*'~h-ir\l!,~~&,*~;f, · &,~'*'

~~~~~~~~~~~~~~~~~~w~~~~~w~w~~~w

PERSPE CTIVk:

L 1B E R O V

A R

T

V

S.

De

unéhs

a~cidentalibus

,

&

corporum quomodocúmque

ind.ifoi.::·

éomrri apparenciis1

A

e

TE N Y S

ta timltlm corpora ptrjfe¡live delineavimui

,

q11or11m Jilptr–

jiau

aliqllit, aut erant paratltl.e tabtlt.e

,

aut ad tam rtEl.e

,

a1q11e adto

q11omm lmet1t txtrtm.e

,

fe11 jltit1t 1111t tjfant vtrtica/u

,

a/it horizontales

,

t4Ü4

fum .edu, co!11mnit

1

citteraq11t fatü

fase

fuptri°M'libro txpltcata. Hoc a11tem

libro dtlineanda jiif(1p1m111 ea corpora

,

qut1t ad horizontem quomodommq11t

fiurint indinala

,

Jive tabetlt1t

{i¡zt

para/lela

,

Jivt ad eam rella

,

Jivt mm ea ang11/11m

q11emc1ímq11e obliq1111rn comprehmdant.

In q11ib111 farü manifrjlutn

rjl

inmm1ertu

1fa

va–

rietatts, qu.e niji itd arta prinápitt revucentur

;

infnit11m mt omnia Jingillatiril perfaq11i.

.f2.!!_are 11t urdine proadamus

,

primo /ineamm q11ammwmque,

&

q11omodo!tbtt ad tabetlam,

a11t horizontem indinatamm apparentitU invtjligabim111

,

ttlm modum e& dividendi in par–

tts q11a(cumq11e

,

fegmmtú objtElivis rejfondeptts doab1m111;

t1/71J mtthod11m plana incli–

nata delineandi

,

&

ih

iis

opuandi

,

hoc

ef/

nfJeE/11 mj11jlibtt p!ani

,

punélrim priucipale,

pun[/a diflantiit, limam ttrrit

,

ajignandi,

&

perpendip1larts in q1101ibtt e¡us pun[/ó eri–

gendi doabim111.

lnápiemui afltem

a

faclliorib111.

.

i!ll!l'ill!!!liilllili!ll1Ji!!l"1!1!11mmll'irM1!lM'(fll1!11,!Jilg¡jNl9"illl"il

PROPOSITIO

l.

Problema.

Linu. cuj11fa11m911e

objelliv~

in plano horkomali

duEf4, apparenti11rn inwnire.

·Incipio

~

lincis hori:r:onralibus. Sir igirur linea

obje61:1va

A

Ir,

qua: cttm linea tcrrz quemcumquc

angulum obliquum comprchcndar,

&

confequcn–

tér cum tinca

DA,

quam fuppono i'l plano hori–

ionr~li

duci,

&

e!íe

ad rabellam,rcél:am, compre·

.Ít'endere angulum

veroi gratii

graduum

60.

quz.

Tom. I

f

Í•

rirur cjus apparentia. Sir puna'u'm ptincipaÍe

C;

linea horizonralis CE,ad quam

Út

pc1pendiculi-

iis

CF,

z:qualis diflantiz oculi

a

~abella:

Fia.t

an~

XXX

1j

.

gulll