[158] Op. vi. p. 238, note 2.

[159] See letter from Cesi to Galileo. (Op. viii. pp. 389, 390.)

[160] Op. ii. pp. 387-406.

[161] Op. vi. pp. 278-281.

[162] Op. xv. (Viviani), p. 350.

[163] Nelli, vol. i. p. 432.

[164] Op. iv. p. 16. This appears also from a letter from Galileo of 19th June, 1619, to Cardinal Maffeo Barberini, afterwards Pope Urban VIII., accompanying the treatise. (See this letter in “Pieralisi,” pp. 63, 64; and “Guitoloni et Gal. Galilei,” Livorno, 1872, vol. i. p. 263.)

[165] “Libra Astronomica ac Philosophica qua Galilæi Galilæi opiniones de cometis a Mario Guiduccio in Florentina Academia expositæ, atque in lucem nuper editæ examinatur a Lothario Sarsi Sigensano.” (Op. iv. pp. 63-121.)

[166] See the letter of Mgr. Ciampoli of 6th December, 1619, to Galileo. (Op. viii. pp. 430, 431.)

[167] Compare the letters of Stelluti (27th January, 1620) to Prince Cesi, 4th March and 18th May, 1620; and from Mgr. Ciampoli, 18th May, 1620, to Galileo. (Op. viii. pp. 436-439, and 441-443.)