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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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d.d
olil
SAPIENETAE DIFINAR.
191
i4. cermini a. b. c. d. geometrice proxortion
males lunt hoc ordine; proportionales etiar
sunc recro, conversim, alternatim, sumpris
V. C. A 4, b:: c. d. = 2. 4: : 3. 6.
ReTTO a.C: : b. a. = 6. 3:: 4. 2
Convertim. B. 2 :: d. c. = 4. 2:: 6 3.
2lternatim _. C. : : b. d. = 2. 3:: 4. 6.
Nam iidem bini, hisce casibus, vel medii sune
vel extremi. Ergo por Produc. 10: ejusque
Con dictamina.
PRODUICTUM XZII.
racetni Factores e. f. 8. b. binorum produ-
Lctorum aegnalium, (cf. = c b. E utrobique
major vel vrrobique inor prxcedit; inter
Se reciptoce proportionales sunc. VcFnEc. 8:=
b. f. Nam quia cf = s B. IsituES. 8: : b. c. X al.
ternatim Conversec.  :: b. f.
Resula de Tri reci
u, deur pr
12 1C
Si crelcence primo termino de-
crescit secundus, primum cum se
cundo mulciplica, a productum
divide per tertium; habebis quar-
CuI.
i
o2. 1
I
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