sir CHRISTOPHER WREN, knt. 21

Discourse, that follow it, were written in the Year 16x2,—Others so late as1720; and the whole consists of divers Methods proposed by Sir Christopherfor that End, with Draughts of several Instruments proper for the Purpose,(engraved on Copper-plates) These Papers are also in the Hands of thefame Gentleman, with the Discourse last mentioned.

This Catalogue in Mr. Professor Ward's Work, compared and adjustedWith the Catalogues recounted before, may be deemed the most perfect thatat present occur.

Sir Christopher has been heard sometimes to reflect sharply on the Disinge-nuity of Mr. Oldenburg., who had neglected not only to enter divers Inven-tions and Experiments of his in the Registers of the- Society, but conveyedthe fame into foreign Parts, France and Germany ; where they were afterpublished under other Names, as their own.

Hence Dr. Sprat in his History of the Royal Society, took Occasion, in Sea - XL.the meer Consideration of Justice, to publish a separate Account of his En- 31I-deavours in promoting the Design of the Royal Society , because in turningover the Registers, he perceived, that many excellent Things, whose jirjl In-tention ought to be ascribed to him, were casually (rather designedly) omitted.

The Problem before recited Number XXXII, was sent from France byWay of Challenge to the English Mathematicians, and a pecuniary Rewardpromised to the Person who should give a Solution : The Solution was givenheyond Exception, and the Premium demanded, which yet at last, by someChicanery, was dishonourably witheld.

His communicative Temper in lending out Papers, never recovered 5 hispeculiar Modesty, and Disregard of publick Applause, and of those Methodsby which Men of the World usually proclaim and support the Merits of*be!r own Performances, prevented the Appearance in publick, under his°wn Name, of many useful Tracts, and occasioned his not carrying on diversDiscoveries to Perfection.

N. B. Mr. Henry Olden burgh, mentioned before, (P. 118.) upon thefoundation of the Royal Society , was chosen Fellow and Secretary thereof,fie hath collected and published Philosophical c sransatfions , commencing fromMarch 6, 1664, and carried on to N°. 136. Dated the 25th of June, i 6 jy.

APPENDIX to PART I.

SECT. III.

Os Additional Records.

NUMB. I.

&r. Flamftead’j Reflections on Monfl. Caffini’r Remarks on hisLetter to Dr. Wallis, relating to the Earths Motion, &c.referred to the Judgment of Sir Christopher Wren, in theTear 1702.

Honoured Sir, Fhe Observatory , Nov. 19, 1702.

I Send you included a long Letter whereby you will find, that Monf. Cajjinihas performed nothing of what he proposed to shew concerning the Effectsthe Earth’s Motion, or the Parallax of the Orb at the fixed Stars. As to^hat he adds and of the Poles of the World and Ecliptick, after you have

perused