[515] Op. x. pp. 157, 158, 165, 170, 171, 213; vii. 63, 64, 67, 68, 71, 138, 253.
[516] Op. x. pp. 66-69, 108-111, 127-130.
[517] Pieroni to Galileo, 9th July, 1637. (Op. x. pp. 222-226.)
[518] Comp. Op. vii. pp. 138, 139, 152, 153; x. pp. 167 and 184.
[519] Comp. Op. vi. pp. 238-276, 338-346.
[520] Op. vii. pp. 73-93, and 136, 137.
[521] Op. iii. pp. 176-183.
[522] Comp. Galileo’s letter to Diodati of 4th July, 1637. (Op. vii. p. 180.)
[523] Comp. Op. vii. pp. 163-174, 190-204; x. pp. 215-218, 228-248; Suppl. pp. 282-284.
[524] Op. vii. p. 193.