Vitruvius - Vitrvvivs Itervm Et Frontinvs À Iocvndo Revisi Repvrgatiqve Qvantvm Ex Collatione Licvit

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6728SECVNDVS. calce & cemento nõ modo cæteris ædificiis præſtat fir
mitates, ſed etiam moles quæ cõſtruũtur in mari, ſub
aqua ſolideſcunt. Hoc autem fieri hac ratione uide-
tur, ꝙ fub his montibus & terra, feruentes ſunt fontes
crebri, ꝗ nõ eſſent, ſi nõ in imo haberẽt aut de ſulfu
re aut alumine aut bitumine ardentes maxios ignes.
Igitur penitus ignis & flãmæ uapor ꝑ interuenia ꝑ-
manans & ardens efficit leuẽ eamterrã, & ibi ꝑna
ſatur tophus exug gens eſt, & ſineliquore. Ergo cum
tres res conſimili ratione ignis uehementia forma-
ta in unam peruenerint mixtionem, repente recepto
liquore unà cohæreſcunt, et celeriter humore duratæ
ſolidãtur, neq́ eas fluctus, neq́ uis aquæ põt diſſol
uere. Ardores autem eſſe in his locis etiam hæc res
poteſt indicare, ꝙ in mõtibus cumanorum & baianis
ſunt loca ſudatiõibus excauata, in quibus uapor fer
uidus ab imo naſcens ignis uehementia perforat eã
terram, per eamq́ manando in his locis oritur, & ita
ſudationum e gregias efficit utilitates. Non minus ẽt
memor atur antiquitus creuiſſe ardores & abunda-
uiſſe ſub ueſuuio mõte. & ide euomuiſſe circa agros
flammam, Ideoq́ nunc quiſpongia ſiue pumex pom
peianus uocatur, excoctus ex alio genere lapidis in
hancredactus eſſe uidetur generis qualitatẽ, Id aũt
genus ſpongiæ, quod inde eximitur, non in omnibus
locis naſcitur, niſi circum ætnam & collibus myſiæ, ꝗa
græcis κχτχκεκχυμένοι nominãtur, & ſiquæ eiu-
ſcemodi ſunt locorum proprietates. Si ergo in his lo
cis aquarum feruentes inueniuntur fontes, & in mã
tibus excauatis calidi uapores, ipſaq́ loca ab

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68
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Scan	Original
61	25
62
63	26
64
65	27
66
67	28
68
69	29
70
71	30
72
73	31
74
75	32
76
77	33
78
79	34
80
81	35
82
83	36
84
85	37
86
87	38
88
89	39
90

Scan	Original
61	25
62
63	26
64
65	27
66
67	28
68
69	29
70
71	30
72
73	31
74
75	32
76
77	33
78
79	34
80
81	35
82
83	36
84
85	37
86
87	38
88
89	39
90