# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/00068200:0196
# Permalink to this reading: https://leibnizlegible.com/page/00068200:0196?run=74
# Title: Leibniz-Handschriften zur Mathematik LH 35, 13, 3 (shelfmark LH 13, 3)
# Folio 97v, page id 00068200:0196
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=00068200&page=196
# Source image: https://digitale-sammlungen.gwlb.de/content/00068200/jpgs/default/00000196.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 47 lines, status machine
# Lines: 47 recognised, mean confidence 0.72
# 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: the recognised lines in reading order, one per line.

Observatio circa calculum
Est autem
5 a aad
2β 1
DC
differentialem
X
BCo
AB H X.
BC 1 Y
AE
Mn
DesiBX
1B2B, 2B3B. 36+B dx.
1DFD. 2D3D. 3045 dy
Anoex dy 
cetum
AFGCA, AEq+GCA L
x
= EFG
um
Nam dx Gu X ay- d y
2
1t
utiae a
CDoet AB sit X. BC, y.
AE, a Eb. a
1β 2β vel 2β3β8c. dX
1525 vel 283d dec. dus
C +ABCV A, AEDC)A- EBCd
H.
1d 20
t
AB CYF - FAB FKCVFB H DOYF. CDHK
 dx
2
M
a- bX FI
y dx = a - Hy
1I (Xdy - y. b X
seu sydr- (xdy p a -X y - y -bx  ay- xy+ bx
cydx = xdu  adue + b dx = 2Xdy + 2ydx
deberer aequatio prodire identica, itaque
calculus corrigendus ut oportet
2l
31
4B