[108] Lib. I. sect. 10.
[109] De la Pesanteur, pag. 169, and the following.
[110] Newton. Princ. L. II. prop 4. schol.
[111] See his Tract on the admirable rarifaction of the air.
[112] Book II. Ch. 6.
[113] Princ. philos. Lib. II. prop. 23.
[114] Book I. Ch. 2. § 30.
[115] Princ. philos. Lib. II. prop. 23, in schol.
[116] Princ. philos. Lib. II. prop. 33. coroll.
[117] Lib. II. Ch. 5.