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THE L I F E O F

7. An Hypothesis t and geometrical Problem about the Comets, in 1664,and 1665.

This was publisli’d by Mr. Hook in his Cometa in 1670. page 40.

These Papers which follow, communicated by him to the Royal Society,later than the History, and never publilh’d, are entered in their Registers,and Letter-books.

1. A Description and Figure of a new Level for taking the Horizon everyWay in a Circle, Register III. p. 184. Produced before the Royal Society,December 12. and March 7, 1666.

This is defcrib’d by Mr. Hook in his Animadversions on Hcvelius’ s machinecælestis, p. 65.

2. An Account of the uncommon Shape of Hail, that fell on the 26th ofMarch 1667 ; about Four of the Clock in the Afternoon, Regist. III. p. 184.Communicated to the Royal Society , November 28, 1667.

3. A Letter to Mr. Oldenburgh , about a Design of building a College forthe Royal Society. Dated from Oxford, June 7, 1668.

4. A Cypher or Anagram, for concealing secret Inventions. Regist. IV-p. 49. Communicated to the Society , on the 4th of February , 1668.

This was transmitted to Mr. Huygens, upon his having sent one not et'plain’d.

5 * A Description and Scheme of an Instrument for drawing up greatWeights from deep Places; Register IV. p. 99. Read May 5, 1670.

1 \

To these may be added, the three following Manuscripts, yet remainingin other Hands..

1. Chrijlophori Wren , Londini, in Collegia Grejhamenji astronomic projejstris, de corpore Saturni , ejufque phafibus hypothejis.

This Lecture in the Author’s own Hand, is now in Possession of WillisJones, Esq;

2. An historical and architectonical Account of the collegiate Church oiSt. Peter, Westminster , and of the Repairs.

This was written by Sir Christopher , at the Desire of Dr. Atterbun,shop of Rochester , and principal Commissioner for the Repairs of that Chur^’about the Year 1714. The Heads of it, with a Letter to the Bishop, fenter'd in the Journal of the Antiquary Society; but the Discourse itself 1in the Hands of Christopher Wren , Esq; . . .

3. Extracts of some loose original Papers, and Minutes, written at sun^Times, relating to the Longitude.

By these Papers it appears, that Sir Christopher had his Thoughts veryupon that Subject, and always kept it in his View afterwards. They ^dispos’d in the Order of an Introduction, with a Discourse following it. TIntroduction, which, excepting the last Paragraph, seems to have been ^ten about the Year 1660, contains various Ways made use of by the ■ h-tients, and in later Times, for finding the Longitude. Some Parts of ^