Overview Level of Folio 161 r


Size Height 305 mm, width 204 mm.
Watermark Crossbow, form 2. Drake's identification: Watermark type 17. Drake's description: Large crossbow 57 X 36mm. Date of earliest letter with this watermark is February 1609.
Comments Written by Galileo; contains text, drawings, table, calculations. Relation to the Discorsi: elaboration of 2/19-pr-06.
Folio 161 r (final text)
1A Sit ab tempus per ab, et posita cd aequali eidem ab, quaeratur tempus per cd. Sit ae media inter ca, ab, et af media inter da, ab: et quia ab est tempus per ab, erit ae tempus per ac; et quia af est media inter da, ab, erit af tempus per totam ad: fuit autem ae tempus per ac: ergo ef est tempus per cd.
1B sit ab 8
cd 8
bc 10
ac 18
ad 26
ae 12 af 14 1/2
ef 1 1/2
C01 26 * 8 = 208
sqrt 208 = 14 12/29
C02 26 * 18 = 208 + 26[0] = 468
sqrt 468 = 21 27/43
C03 16 * 9 = 144
12 = 3 * 4
C04 190_270
1260_2440
190 * 190 = 36100
270 * 270 = 32900
C05 sqrt 1260 = 35 1/2
sqrt 2440 = 49
C06 270 * 35 1/2 = 9450 + 135 = 9585
9585 : 191 = 50
C07 9585 : 192 = 49


Overview Level of Folio 161 r