[Figure 51]

[52] FORNIX.

[53] HEMISPH ÆRIVM.LVNVLATVM.

[54] narũt ſi- cut quod ad perpẽ- diculũ eẽ dicimus, id eſſe a- iunt fa- ctum ad plũbum.

[55] Hemicylindri figura.g b l c K J h @ d p @ @ b d f c

[56] Meſolabii Figura.@ d g s t c f h m b d g q @ n c f h m p

[57] d c @ @ @

[Figure 58]

[59] ERGATA.

[60] SVCVLA.

[Figure 61]

[Figure 62]

[Figure 63]

[Figure 64]