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# Title: Leibniz-Handschriften zur Technica LH 38
# Folio 93v, page id 00068537:0186
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=00068537&page=186
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ova viatio porcendi per ignem subit. mire perfecta si commode Reequi
-
xliceat utilissima tum phaeri, vitrcis
tum
convexis concavis.
tu
Reculis tum leatibus
conpam
Ac primum videamus pro speculis vitrers. Cum tantum
quertam speculi superficiem terminatam probe esse necesse sit, interior vero
ive concava
c
tam absoluta esse non debeat, hunc ita agemus.
 sit ex ferro, vel saxo, vel luto fictili ma
 convera sphaerae portio ABC Qualis opus est
si
et CidtT 
fiat scili optime fiet ex materia
ec
as
t potiri nannibil possit et
si molli quae potea in igne ita indurescat, ut non facile
luat vitrificeturque aut figuram mutet. Haec fieri optime
poterit sola arcus DEF ex desiderato centro fect secti rotatione circa
centrum quem GE. is enim inutilia obsciudet. Hoc facto ponatur ABC in fornace, eiq
superponatur lamina vitrea probe munitis lateribus crcum ne decidat; ea igne mollita 
se applicabit ipsi ABC, quo facto supponatur rursus arcui qualis DEF, (extollendo ABC versu AEF
et excoquatur
LA
ne cochleolae vel aliter) er aurante mollitie sive calore circumactus arcuferreus DEF perfecte poliet
postC
sua vitrum  mus auu in eindosue darcumo osue blassbale und stanb, duris
eis bloste sige und gluts phinaer et debet tatuen vitrum firmum esse ad AI
C
acie,
feruum in jepe fundatur arrecto  sulphure, et durante fusionie circumagatur continue
s
cycumagetur cum DE
e
sarequs ex in centio quolibet antea descriptus;  is acie sua
circa aione honconti perperdiculasiem
Si
arcus
circuli 
fpolitam relinquet, scutellam. Res eo iccuratii fiet,
quia momento fit. Outante motu paulatim refrigerabitur ferrum imo et formax. Considerandum
abscindet a ferro superfluum
hic, an saxum praeservari possit a fusione seu vitrificatione, 2 an non non fignura muletur
Idaratos
durante retrigeratione, ita ut quae antea congruebant non ampliqus congruant.
hoc modo, sentellis et et eodem modo circa axem agitatis upplicatum in igne
et
eodem modo
parabolicas
plerumque ne opus
vitrum figuram perfecte assumet, et polietur
hyperbolicas parare scutellas perfacile erit quare et vitra.
quidem erit sentellis, sed sufficiet arcum ferreum secum acie sua (quae politissima e
debet) Avitro imminete, et supra ipsum circum agi
incrementa habebimas
Hinc jam maxima optices
ee
5+
d