Archimedes - Archimedis De iis qvae vehvntvr in aqva libri dvo

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28ARCHIMEDIS extra humidi ſuperficiem, axem habetin perpendiculari
per _k_: & propter ea, quæ ſuperius dicta ſunt, centrum gra-
uitatis ipſius eſt in linea n _k_, quod ſitr; totius autem por-
tionis centrum grauitatis eſt in linea f t, inter _k_ & f, quod
ſit x. reliquæ ergo figuræ, eius ſcilicet, quæ eſt in humido,
centrum erit in rectalinea r x producta ad partes x; & aſ-

16[Figure 16] ſumpta ex ea linea quadam, quæ ad x r eandem habeat pro
portionem, quam grauitas portionis, quæ eſt extra humi-
dum, ad grauitatem figuræ, quæ in humido. Sit autem o
centrum dictæ figuræ: & per o perpendicularis ducatur
l o. Feretur ergo grauitas portionis quidem, quæ eſt ex-
tra humidum, per rectam r l deorſum; figuræ autem, quæ
in humido, per rectam o l ſurſum. non manet igitur flgu-
ra; ſed partes eius, quæ ſuntad h, deorſum ferẽtur; & quæ
ad e ſurſum. atque hoc ſemper erit, donec f t ſecundum
perpendicularem fiat.

COMMENTARIVS.

ITAQVE figura, quæ extra humidi ſuperficiem,
11A axem habet in perpendiculari per _k_. ]

D_vcatvr_ enim b c, quæ ſecet lineam n k in m: ipſa uero
n k circunferentiam a b c d ſecet in g. eodem modo, quo ſupra,

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Scan	Original
121	5
122
123	6
124
125	7
126
127	8
128
129	9
130
131	10
132
133	11
134
135	12
136
137	13
138
139	14
140
141	15
142
143	15
144	16
145	17
146
147	18
148
149	19
150

Scan	Original
121	5
122
123	6
124
125	7
126
127	8
128
129	9
130
131	10
132
133	11
134
135	12
136
137	13
138
139	14
140
141	15
142
143	15
144	16
145	17
146
147	18
148
149	19
150