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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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240
DB PROPORTIONE
Subd. 2. trujus. Requi sic etiam est Cubus su-
per prima ad cubum super secundâ: ue exprae.
missis Patet. FrBO.
Subdict. VI.
Si 4. rectae sins proporcionales hina rectilinea
similia, descripea a duabus primis, sunt
proportionaliabinis alteris inter se simi-
libus (diversalicet formae,) à posteriori
bus descriptis. Fie. 54.
Subdict. VII.
Si4 rectae sint proportionales; etia parallel.
epipeda, quae ab ipsis C5 similia (5 simili
cer descripta sunt, (V.5. Cubica) propor-
tionalia erunt.
Subdiet. IIX.
in omni parallelepipedo, diametri es diago.
nales omnes, se mutud bisecant in uno
puncto, tanquam in Centro.
Subdict. IX.
Ut Trianculum parallelogrammi, super ea–
dem aut agualibasi es in iisdem paralle
lis rectis, dimidium est; it aprramis, Pris-
matis super eadem aut equali bast C5 in
iisdem parallelis planis, est tertia pars.
Quod de Cionis respectu Cplindrorum
etiam verom) est.
SUB