# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/DE-611-HS-3595205:0165
# Permalink to this reading: https://leibnizlegible.com/page/DE-611-HS-3595205:0165?run=74
# Title: LBr. 437 · Huygens
# Folio 80r, page id DE-611-HS-3595205:0165
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 79v); this page is its right half.
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=DE-611-HS-3595205&page=165
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-3595205/jpgs/default/00000165.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 10 lines, status machine
# Lines: 10 recognised, mean confidence 0.88
# 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.

Question
 trouuer la valeur de la grandeur  tellement formée des grandeurs
aib, c, d, que lors qu’on pose a = b soit 2e = (- d
C+0
et lorsqu’on pose c= d alors soit 2e = a-b
Solution
Cela arrivera en faisant
a+d
Z bC ac - bd
b. B arb. crd