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# Title: Erhardi Weigelii Sacrae Caesar. Maiest. ut & Com. Pal. Sultzb. Consiliarii, Supr. Artium Archit. Directoris Saxo Ien. Mathemat. PP. totius Academiae Senioris, Philosophia Mathematica (shelfmarks Leibn. Marg. 65; ZEN Leibn. Marg. 65)
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BAPIELTLRE DIVINRE
PRODUCTUM ZIX
Gi Mmapcitas a per certas vices e rancupsicat;
cune productum ac geometrice ad vices e. se
hrabet, ciei quancitas a ad unitatems Hemipe
Ree:: a. ia LVaM C1 5 a.ls OIMBE O
ac
a. OuOtuS
e
(a. Ouotus idem.
Tet IBMI. LIIPROOvETUM XL.20
Ci quattor termini a. b. c. d. Ene Boomerrice
proportionales; productum mediorum est 
1
quale producto extremorum. LGe
Nempe, R a. b. = = c. d. et Ouotiens seu Ntomen
Rationis, Cre Vices concinentixe dieantur Z.
C3 B =42 HO ad = a217
THBE
ErX ad- b0.
a= 12 = 26. FrC. bC = a ZC5
SUB- BICTAMEN
SAPTENTLALDEVINS
Si terminorum bis binorum bini medii
productum faciuns, idem quod exrremorunt
binri geometrice proportionales sunt.
CONLDTCTAME
Si tres termini continue proportionales
funt; Duadrarum medii Coroductum ejus
in le ducti, est aequale tantuplo primi cu
tertio
2b.2
leo