which would not be affected by the different refrangibilty of light; which would not be affected by the different refrangibility of light; p. 741 Having thus got rid of the principal cause of the imperfection of refracting telelescopes Having thus got rid of the principal cause of the imperfection of refracting telescopes p. 759 and the _same cofficients_ with the original series and the _same coefficients_ with the original series p. 766 the measures of the angles expressed by (360° ⁄ _n_) × _m_, 2 × (360 ⁄ _n_) × _m_, 3 × (360 ⁄ _n_) × _m_, &c. the measures of the angles expressed by (360° ⁄ _n_) × _m_, 2 × (360° ⁄ _n_) × _m_, 3 × (360° ⁄ _n_) × _m_, &c. p. 768 The soluion of this case, in a manner a little different, The solution of this case, in a manner a little different, p. 773 We see by this, that the effects of the poison of the Manchinelle are different We see by this, that the effects of the poison of the Manchenille are different p. 842 I beg leave to subjoin it by way of postcript. I beg leave to subjoin it by way of postscript. p. 846 coverings in different parts of the the world. coverings in different parts of the world. Index _Vapour_, remarks on the opinion of Henry Eeles, Esq; concerning the ascent of it, p. 240. _Vapour_, remarks on the opinion of Henry Eles, Esq; concerning the ascent of it, p. 240. Errata p. 497 Also (2_a_)²: _vv_∷ _a_: _vv_ ⁄ 4_a_ should be Also (2_a_)²: _vv_∷ _a_: (25b ⁄ 21c)² × _vv_ ⁄ 4_a_ 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