# Leibniz Legible — https://leibnizlegible.com
# Piece: https://leibnizlegible.com/api/records/59664/text
# Catalogue record: 59664 — Friedrich Nitzsch an Leibniz
# Incipit: Quanquam gratissimae fuere literae Tuae, gratiores tamen hoc eas reddi
# Date: 1671-02-18 (71-02-08)
# Sender: Nitzsch — Addressee: Leibniz
# Akademie-Ausgabe: AA II,1 N. 043
# Other printings: E: LAA II,1 (1926) N.43.
# Record in the Leibniz-Katalog: https://leibniz-katalog.bbaw.de/de/extended-search?id=59664
# AA II,1: its series at Leibniz-Forschungsstelle Münster (online after accepting its terms): https://www.uni-muenster.de/Leibniz/seite5.html
# Work: https://leibnizlegible.com/work/DE-611-HS-860645
# Title: LBr. 686 · Nitzsch
# Folios: Bl. 9–10 (from the shelfmark LBr 686 Bl. 9-10): 4 pages, canvases 17–20, page ids DE-611-HS-860645:0017 to DE-611-HS-860645:0020
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=DE-611-HS-860645&page=17
# Lines: 84 recognised on 3 of 4 pages, mean confidence 0.92
# Catalogue: Leibniz-Katalog / Arbeitskatalog der Leibniz-Edition (https://leibniz-katalog.bbaw.de/), ed. Arbeitsstelle Potsdam I der Berlin-Brandenburgischen Akademie der Wissenschaften, CC BY 4.0.
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line, page by page: a "## Folio <label> — <page id>" line ("## Canvas <n>" where no folio label is recorded), "# " lines naming its source image and model, then its recognised lines in reading order, one per line.

## Folio 9r — DE-611-HS-860645:0017
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 10v); this page is its right half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-860645/jpgs/default/00000017.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 22 lines, status machine
C
V2 Nobilissime e Consultiesime
Fautor e Amice Honoratissime
vanquam gratesimae fucre literae Tuae, grationes tamen
hoc eas ceddidit, quod ab Mllustrishimo Boineburgio seruli
noctu ornamento misu sint allatae. Ita enim dedere ansam
ut quam olim se ipso procurante, Illuctrissimo Viro deca-
ravi devotionem mediantibus literis suis declarare denuo
potuerim. Adeo Tibi soli debeo, quod tanto Viro non
lignorer. Sed porro mirum quantum de me demerereris
si Gallorum Ephemeridet nni 1670. mitu communieares
Memini enim se mentionem illarum in Epictola quadam fa
cere, d surcinita dare excerpta illorum, quae ibi habentur
notatu digna. In eo enim sum, ut proximis Nundinis edatur
Verrio Anni 69. Quae cum mote sit exigua rgitior comm
dissime Annus 70. ad jungi posset. Est quidem quici
e
eu
plar Gallicum mihi procuvrabit sed modantibus demua
brundinis. Reddorem utique eas non sine magna gratia
rum actione. Disputationem Opticam transmiterem
hac quidem vice niri foate Curtori publica fiuit molestia

## Folio 9v — DE-611-HS-860645:0018
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 10r); this page is its left half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-860645/jpgs/default/00000018.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 22 lines, status machine
mittam tamen, quamprimum commoda obtulcrit, sere op
Cagio. On Mechanidis nunc occupor, quae d forte edentur
siquidem sit qui impensas ferre velit. On. Nergelius in
Ardraulico invento laborat tali quidem, ut siphones, ventic
sint extra canalem. Varenus quoque Geographiam integri-
tati suae restituo, suppletis is, quae injuria neriio quad
figurarum absentia d lacunis non unis egregium Autorem
mutilum reddidere. Et in hisce dalijoque tempus tantum non
noutiliter tero. De Optioo illo quae scribis inverta redo
se ratione habent, ital ut plana polita si faciunt obtu-
sum lum pauciores, sin acutum plurei repraesentent
amagines, uti dexperientia tectata est, siquidem recte
retordor. Nam o ipse specula illa vidi. Quod si ergo
ita est ratio est lin promptu propter reflexionem ima
gonro ita finea lo talibus planis objedo figura a
ro apparet, siquidem plana obtuse aperiantur, porro si
magis ad se accedunt plana repraesentatior pentagonum
si adhuc magis heprtagonum eti prieter imaginem quae
in junctura videtu daccto
radio
7
tobi.

## Folio 10r — DE-611-HS-860645:0019
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 9v); this page is its right half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-860645/jpgs/default/00000019.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 40 lines, status machine
Lana, Du Sonius, Ottius, Titelius, Worennus dioptricam mechanicam
perficere conantur.
Losui vero lorum imaginis in ipsam superficrem in fi
gura quod quidem faciendum non esset siquidem
avcurate sihema depingendum foret sectundum ea
qua tradunt Optici de loro maginis. Nihil vero
ad murtitudinem imaginum monstrandam id rescit
De lentibus Hyurbolicie alio tempone scrbam
jam eo intercludor. Interim vale faveue
2r Robiliisime d
c
onsulties: me
Gressie d. 8. Febr. A. V.
aid. Sitstiar
Ex responsione.
67l.
P.
rgone Gersleru Gnvitatorias ad
nuptias misit? evid vero su e
ego facimus? Scilicet Thilosopta-
mur. Vale
angulus sit acutior contrarium aro insederat
Fortusse interrogari Woeigelius pt. praeterea in fallor appa rebant imagines oes in ipsa
etii objectum proxime speculo admoveretur
junctura cum in delinaptione dua reliquae omnes praeter unam in ipsa junctura suit pro
pro res loculo quam ipsum objectum. Deinde reflegione reflexionum facient imaginem
semper minoreno, ut apparet si speculum in alio speculo intreare. At hic imagures
erant si bene memini magnitudine aaequales et proinde a se in vicem indergnatis
credo etsi quaedam tectae fiuissent, quas aliax causas supporus illas, illas ipsatalias
tameri, apparituras fuisse. praeterea nondum capio quod in ipsa junctutas
possit apparere imago isi quidem ea non st esse unum couinuum satoquila
specutu non essent ilobilia At lvergetio fortasse a strncitura discer possam
10
phaenomeni duorum speculorum
conjunctorum imagines pro anguli
conjunctionis varetate, multiplicam
tum causam reddis admodum inge
mosam, nondua taneu meminissus
possum numerum esse majorem, C.
n

## Folio 10v — DE-611-HS-860645:0020
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 9r); this page is its left half.
# No recognised text on this page (recognized).