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Parentalia, or, memoirs of the family of the Wrens : Viz. of Mathew Bishop of Ely, Christopher Dean of Windsor, &c. but chiefly of Sir Christopher Wren ... in which is contained, besides his works, a great number of original papers and records on religion, politicks, anatomy, mathematicks, architecture, antiquities ... / comp. by his son Christopher; now published by his grandson Stephen Wren
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THE

LIFE O F

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Hac dum apud nos geruntur, ecce adfert nobis tabellarius die 4 Januariiinsequentis (St. Ang.) D. Hugenii Ittlras, ejufdem menfis die 5. {at St. nov.)exaratas, ejusque scripti, De motu corporum ex rnutuo- impuliu^ priores re-gidas quatuor, und cum^demonftrationibus, continent es, habebam ego in promptutheories Wrennianæ apographum, idqae adlutum eodem plane die, fe favente-tabellione publico, D. Hugenio, hojlimenti vice, remittebam, dilata interim li-terarum Hugenianarum, (quihus tale quid includi, ob mdem, & -.mitegrefrumauthor is promijjiim J'ufpicabar) refignationc, donee ferret occa/io nobilijjimum &sapientijjimum Regiæ Societatis prœsldem, D. Vice comitem Brouncker, combel -landi. QuofaBo, amborum regulis in modo dicta Societate collaiis, miruVron -festim in utroque consensus effulstt ; id quod insignem in nobis libentiam pariebat,utrumque hoc scriptum prœlo nosro committendi. Nihil hie nobis deerat a parteHugenii, quam ejus consensus ; abfque quo fas nequaquam judlcahamus, ipjiuiinventum, maxims cum illud haud integrum eo tempore nobis de dis et, in lucentemittere. Curce interim nobis erat,^scriptum ipjius public'ts Regiæ Societatismonumentis inferendi simul & authon die 11 Januar. Solennes pro cor data -ilUcommunicatione gratias reponendi ;, additd dchinc die frill 4 Eehruarii) frllicit* 1commonesadlione, ut suamhanc theoriam w/Parisiis, (quod proclive eratsadlu ittEruditorum, ut vacant, Diario) vet hie Londim in adverfariis philosophiesimprimendam cur ar et, vel saltern permitteret. Quibus expeditis literis, pauhpofi secundas accepimus ab Hugenio, scripti Wrenniani de hoc argumento redtetraditi mentionem facientes, nil tamen quicquam de suimet scripti editionc, velParisiis vel Londini parandd, commemorantes.

Unde liquere omnino autumem, ipfum sibi desutse Hugenium in ilia puhlt*.cat tone maturandd ; quin imo occajimem dedis'e procrajlinando, ut laudatusWren, pro ingenii jui fagacitate geminam omnino theoriam eruens , in glorifyhuicspeculationi debitce, partem jure venires ; cum extra omne st dubium, llCll"trum horum theories illius quicquam, priuj'quam scripta eorum compareretitscivise ab altero , fed utrumque, propria ingenii sœcunditate, pulchellam ’hanlsobolem enixum fuijse.

Solvit equidem Hugenius, ante aliquot jam annos, Londini cum ageret, W oide Motu cafus qui ipfi tune proponebantur ; luculento Jane argumento, eum j<$turn exploratas habuijse regulas, quarum id evidentid pr afar et. At non ajf r \mabit ipse, cuiquam se Anglorum suce theories quicquam aperuijfe ; quin fatetenetur, fe ab eorum nonntdlis ad communicationem ejus Jolicitatum, nec tam$unquam-, nifr nuperrime, ad id faciendum pert radium fuijse.

His itaque veritati V justifies litatis, ipfas jam Hugenii regulas dona 0 ‘&c.

‘Tabula refratfionis radiorum in medio vitreo (suppoftd maxima resradU^vitri, 489.) secundum hypothesm exquijitisimam philojbphi Angli calculata.

Letters, of Astronomy, from Sir Paul Neile, to Mr. Wren, in the Ye asS1655, 6, 7. and 9.

XXX.

To make an uncertain reciprocal Motion tend to the continual Progress ^an uniform progressive Motion.

XXXI.

De cycloidibus, eorumque segment is, nec non de spharoidibus cycloidalibus, ^fegmentorum cyclotdalium solidis rotundis.

Liter# ad D. Pascal, Parisiis. De dodlrina cycloidum.

Liter# a D. Pascal. De eodem argumento, data Parisiis 1658.

Liter# ad D. Carcavy, Parisiis 1658. Qyibus continetur solutio p r0 ,;,

10 tV