# Leibniz Legible — https://leibnizlegible.com
# Piece: https://leibnizlegible.com/api/records/42218/text
# Catalogue record: 42218 — Leibniz an Friedrich Schrader
# Incipit: Multum humanitati Tuae debeo, quod libellum tuum perelegantem de Micro
# Date: 1681-03
# Sender: Leibniz — Addressee: Schrader, Fr.
# Akademie-Ausgabe: AA III,3 N. 192, AA II,1 N. 231
# Other printings: -E1: LAA II,1 (1926) N.231 (Teildr.). -E2: LAA III,3 (1991) N.192. Übers.: -Leibniz, Œuvres choisies. Avec préface, notes, table par questions et table des noms propres par Prenant, Lucy. Paris: Garnier, 1939. [frz.] S.70f. (tlw.) -Leibniz, Œuvres. Editées par Lucy Prenant avec introduction, tables et notes. Paris: Aubier Montaigne. Tome I. Introduction, textes et commentaires. 1972 [mehr nicht ersch.]. [Prenant Œuvres²]. [frz.] S.146f. (tlw.)
# Record in the Leibniz-Katalog: https://leibniz-katalog.bbaw.de/de/extended-search?id=42218&katnr=39838
# AA III,3: its series at leibnizedition.de: https://www.leibnizedition.de/de/reihen/reihe-iii/
# 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-866795
# Title: LBr. 886 · Spinoza
# Folios: Bl. 3–4 (from the shelfmark LBr 886 Bl. 3-4): 4 pages, canvases 5–8, page ids DE-611-HS-866795:0005 to DE-611-HS-866795:0008
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=DE-611-HS-866795&page=5
# Lines: 110 recognised on 4 of 4 pages, mean confidence 0.93
# 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 3r — DE-611-HS-866795:0005
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 4v); this page is its right half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-866795/jpgs/default/00000005.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 79, 2026-09-07T03:33:42Z — 40 lines, status machine
e
guin
escop
S
Leibait
len
e
re
leum
m
L aoa fiinta
Videburadi
an Lic quoque
Experienti
duum
Multtm humanitati duae debeo, quod libellum
perelegantem de Micioscopiis mihi dono mittere voluisti. Varde
sum delectatus tum dictionis elegantia, tum maxime rerum
egregiarum copia; hortorque ut quantum per practicas occupationes
licebit plura hujus modi subinde publici juris facias.
Nescro
an tibi relatum sit quis fuerit Microscopiorum globularium
inventor primus. Tum autem esse intellexi Joh. Huddenium
Consulem nunc Amstelodamensem. Qui ea jam anno 1663
ostendit Monconisio, quemadmodum in itinerario ejus jam tutum
impresso notavi idem mihi in Batavis agenti ab ipso Huddemo atque
Cum Delphis transirem leervenhoesiio
sum aliquandiu collocutus, magnique feci diligentiam viri, vellemque eum
aliis confirmatum est.
edere non tantum plurimas observationes suas, sed et ipsam
enim multas 
methodum observandi non dubito, quin s habent cautiones
-
dus enchireses, quibus hoc negotium facilius reddatur. Et te quoque
sane non paucas, nec inelegantes attigisse video; quodsi plures aliae
tibi sunt compertae, eas libentissime discam.
quomodo nitri particuloe sint cubicae, ut ex illis componatur figura
sexangularis valde vellem intelligere distinctius, si tibi id
cremate aliquo illustrare vacabit
am multa nunc labemus egregia naturae plaenomena

## Folio 3v — DE-611-HS-866795:0006
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 4r); this page is its left half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-866795/jpgs/default/00000006.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 79, 2026-09-07T03:33:42Z — 30 lines, status machine
ut mihi jam tandem tempus esse videatur accingendi
sese ad oulinandam earum congeriem, constituendasque conclusiones,
Nam ut olim inopia, ita nunc confusione laboramus. Idque saepe
monui doctissimos quosdam amicos ex societatis Regia Anglicana
qui et assensi sunt. Nam si sic pergimus posteritati quidem
ingentis aedificii materiam relinquemue, sed ipsi agemus
sub dio nec laboribus nostris fruemur. Unde viri
fieri etiam video, ut homines practici nora ista experi
menta contemnere soleant, quasi nihil inde duci possit
ad usum vitae.
in quo falluntur sane sed ipsorum philo-
sophorum experimentalium plerumque culpa, qui saepe conclusio
nes quas possent non eliciunt.
Cur autem id non fiat
primo quod experimenta atque
duo in causa esse arbitror
observata dispersa sunt, neque in quoddam invertarium relata
pleraeque enim conclusiones exurgunit ex multis experimentis inter
se certa quadam ratione combinatis:
secundo quod
hi qui experimenta colunt rutiocinandi artem ipsam, nempe
fere
mathesin (quae logica quaedam physica est) negligunt. Quanquam
logica quoque ipsa generalis, seu ars demonstrandi impune a Dysico
contemni non possit; et imo Compererim ego, sine quibusdam
demonstrationibus meta physicis non posse demonstrari veras
motuum leges; unde hactenus nondum quod sciam ita
Etsi enim omnia
extant, quemadmodum oportet.
fiant in natura secundum leges mathematicas et mechanicas

## Folio 4r — DE-611-HS-866795:0007
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 3v); this page is its right half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-866795/jpgs/default/00000007.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 79, 2026-09-07T03:33:42Z — 35 lines, status machine
comperi tamen ipsas leges mechanicas ex altioribus principiis oriri
quia et si im materia, per se sit mobilis, motum tamen actu ipso a
se habere non potest, sed a causa quadam incorporea excitati
rebet. Constitutis autem legibus motuum tam s in solidis, quam
in liquidis, tum demum et mechanica reduci poterunt ad terminos
purae Geometriae, et physica ad terminos purae mechanices.
et poterimus elicere ex datis experimentis, quicquid inde
elici debet; nec dubito quia hac methodo ab aliquot viris
industriis inter se conspirantibus plura intra decennium agi
possint s ad usum vitae, quam alias intra seculum
Sed ut dixi methodo opus esset duplici
tum experimenta ordinandi atque in inventarium redigendi
illis ratiocinandi seu mathesin cysicae
es ultra
tum ma ex
applicandi.
Quod nemo novorum autorum hactenus praestitit
postremum
et Cartesium aliosque pancissimos excrpras.
Poylii et judicium et industriam experimentatem
en
facio saepe tamen miror, ex multis egregus
e
si Galilaeum
observationibus nullas eum elicere conclusiones alicujus
momenti. plerumque enim illud tantum protritum
concludit, Quod scilicet omnia sieri debeant per explicari
et motum. Mihi vero tempus
per magnitudinem figuram
tandem esse videtur ut explicane tentemue, qua
magnitudille, quibus figuris motibusque phaenomena sint
explicanda. Alioqui philosophia nostra non multo ad
Quod si itaque
praxiu utilior erit quam vulgata
i ean multos in observando quidem erulamio

## Folio 4v — DE-611-HS-866795:0008
# Scan: One image of two folio pages side by side, registered by the library under both labels (also fol. 3r); this page is its left half.
# Source image: https://digitale-sammlungen.gwlb.de/content/DE-611-HS-866795/jpgs/default/00000008.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 79, 2026-09-07T03:33:42Z — 5 lines, status machine
et Boylio in ratiocinando autem
Galilaeo et Cartesio
similes haberemus;  si experimenta ordine institueremus
et disponeremus; si ratiocinationes experimentis inaedificando
mathesin physicam magis excoleremus