¹²si post corr. A
¹³post latera del. aliquot literas A
¹⁴regula generalis in marg. A
¹⁵post d del. aliquot literas A
¹⁶ante huius del. aliquot literas A
¹⁷post ex del. ex A
¹⁸ex praemissa in marg. A
¹⁹ut ostendit Ptolemaeus signo posito in marg. A
²⁰quod datur per praemissam et primam signo posito in marg. A
²¹quae in interl. A
²²diametro correximus   semidiametro A
²³ut ostendit Ptolemaeus in marg. A
²⁴ante Nam del. aliquot literas A