Apparatus

94connectantur S   connectant C
95orthogonales S   hortogonales C
96orthogonales C2 S   ortogonales C
97ante Hic del. in sphaera quidem C
98quod S   qui C
99ideo S   id C
100ergo C2 S   G C
101sunt S1   om. C S
102Quod coniecimus   Sicut C S
103recta supplevimus
104circularem C2 S    aliquot litterae legi nequeunt in C
105umbram S1 C   umbra S
106umbra S1 C   umbram S