HUG 1, ff. 053r-55r, inc. Sec. Ricc. med. mot.
Incipit:Sec. Ricc. med. mot.
Concordance with OC:
Most of the calculations, including those on f. 53v below the notes on Riccioli's book. Some are cited in OC 21:638 n. 37 and n. 41 and 640 n. 42; the ratio 70 to 43 mentioned in n. 39 is on f. 55r.