Also (2_a_)²: _vv_∷ _a_: (25b ⁄ 21c)² × _vv_ ⁄ 4_a__Philosophical transactions, Vol. L. Part II. For the year 1758. Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world.

p. 542

sin. (AC + AM) ⁄ 2 × sin. (AC - AM) ⁄ 2 = ((_b_ + _d_) × (_b_ - _d_) =)

(sin. ½ AC + sin. ½ AM) × (sin. ½ AC - sin. ½ AM).

should be

sin. (AC + AM) ⁄ 2 × sin. (AC - AM) ⁄ 2 = ((_b_ + _d_) × (_b_ - _d_)) =

(sin. ½ AC + sin. ½ AM) × (sin. ½ AC - sin. ½ AM).

p. 830

hincque motus apsidis spatio unius anni solaris prodit 33´, 95 vel ferè

34´ in consequentia, qui tempore

should be

hincque motus apsidis spatio unius anni solaris prodit 33´, 95’’ vel

ferè 34´ in consequentia, qui tempore

Philosophical transactions, Vol. L. Part II. For the year 1758. Giving some account of the present undertakings, studies, and labours, of the ingenious, in many considerable parts of the world. · 第 119 / 119 题