The volume also contains:
(i) Mr. Newtons's Letter to the Publisher of March 26, 1672. containing some more suggestions about his New Telescope
(ii) Extract of another Letter... dated March 30.1672 ... Answer to some Objections, made by an Ingenious French Philosopher
(iii) Considerations upon part of a Letter of Monsieur de Bercé ... concerning the Catadriopical Telescope
(iv) Some Experiments propos'd ... Observations made therupon by the Author of that Theory
(v) Letter of April 13. 1672 ... being an Answer to the fore-going Letter of P. Pardies
(vi) A Serie's of Quere's propounded by Mr. Isaac Newton, to be determin'd by Experiments, positively and directly concluding his new Theory of Light and Colours
(vii) Answer to the foregoing Letter [A second letter of P. Pardies]
(viii) Answer to some Considerations upon his Doctrine of Light and Colors
[Wallis 231 (3)-(10)].