A Letter from Mons. Du Fay, F. R. S. and of the Royal Academy of Sciences at Paris, to HisGrace Charles Duke of Richmond and Lenox, concerning Electricity. Translated from theFrench by T. S. M D.Author(s): Mons. Du Fay and T. S.Reviewed work(s):Source: Philosophical Transactions (1683-1775), Vol. 38 (1733 - 1734), pp. 258-266Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/103851 .Accessed: 16/11/2011 15:25

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V. Stettes frorn l\donl. Du Fay, F. t. S. and 0/ t17e toyal Acddemy oM Sciences at Paris, to Avis Grace CHARLES Ste o+-Richmond vezd Lenox, coacernisag El6criclty. TranJ7aF ted fro tbe French by T. SS M 0.

ParisZ Docealberw7, x733. 1flLORD,

T Flatter Iny felf your Grace utill not be dirpleaw 1 Sed with an Account of folne extraordin3ry DiCv c-osreries I have tnade in tlle lElRePfrxcity of Bodies, nogr refuSe tlae Favour I 11ave to atk, that it lnay be comtnunicared to tlle ROJag SocietZ. I owe tllis HOIT3age to tllat IlluRrious Body, not only as a Ntelr- ber rllereof, but in tllis reEped as a Debtor to tlleir Works:; for tlle SVritings of lUlr, Gra)w, and the late Mr. Haaksb ee, botll of tilAt Society, firk put Ine upon the SllbjeEt, and furniRss'd Ine with the ESints- that led me to tlle followin DiCcoveries.

FirR, I llave found tllat a11 Bodies (tnetallick} foft or fluid ones excepted) tnay be made EIedrick by fiirIt heating theln more or lefsX and then rubbing thein on any iort of Cloth. So tlla; all kinds of StoneSX aS well precious as cOlmtnonX all forts of Wood, and in general every tlling tllat I 11ave tnade lsrial ofX becalne EleEtrick) l)y 11eating and rul)loing; except fuch Bodies as grow foft by Heat, as the (;UIliS, whicll diXolve inWater, Glue, and fucil otller Subfiances. s fis alSo to be reinark'd, thattlle

hardell

( 258 )

( 259 ) 11ardeSt Stones and Marbles require more chsling ar

eating tan othersy and tnat tiue ta>$e Pue tbt3105 wZitll regard to (te Woods ) b +tat noxX LgXa Kt} atld focll or(sers {nuR be clwafed atfnOft ro (ae Degree of bulnlugX wllereas }:r} Liswe->ee and Cor2, require but a tnoderate tSeat

Sesoxd@ Having read z OrlEsOf M. PrSNv8zether folid or fluid; and tllat fbr tllAt Pur?ok twas SEci ent to fet tl;wetrX on a Glafs-Stand niglztly urslrkn>J} or only drled ; and tlacn by brinbing the tube twear them} they itntnediately becatne Eledrlcal I tntade tIS Egxperitnent utsth Ice} witll a lighted Wood*coalt and w1tl every thin tat ctltnd into 1ly )1iFld > and 1 con0santly relntrldd tlla {;8cnl Bodies as of vlletnCetves utere leati Ele&rical} had tlle greateft egree of ;lec- tricity cotntnunicated $o thein at tlle Approacll vf tlle GlaSs Tube.

fiird& A1r. Grey fiys} tnsrards tline, and then boitlging the Tube ntar them7 the blank one svasfir{t attradeda the WiJitt

( 260 ) one next, and the others in Order fucceE1vely to the; red OnCx xvhicI1 xvas attraAed lea} and t1ze 1ad of thetn a11. I afterwards cut out ninn Square Picces of GauCe; of tl1e fatne CO1OUFS zvitXla the RibbonQg and having put them one after another on a II30? of \Xtosd with LeafvGold under thetn9 t'ac LeafsGold wasat-- traded tllro all the coloured Pieceb of Gauti> bta: not thro' the wllite or blacko this inclirAed Ine at firIl to think) t} tilat ttilS DiSerence prc?ceeds not frotn tile Colour, as a ColourX but frorn the Subltances tilat are en91oy'd in thp dyingZ For uJIlen I coloured Ribbons3 bft rubbing tiletn writil Charcoal, CfirinineX and LucI1 otller SubR;nces, tile Difirences no longer proved tile fatne.

FUg - tZJlS,y, FIaxting cotutnunicated tlle EleAricity of t:ffze Tube b Mens vf a Packthre.adX after b'[r.Gray's tuanner I obirv'd, that elae EXxpWrilnent fucceeded the better for uretting tile Line s and tlaat it Inay bc fi.pported on GllEs-rubes inCead of Silk^LinesX Ata;l I tnade tilis l:gxperilnent at x^S6 Feett)iRance

( 26t ) in a Gfirden) tllos ttze Wind was lligll, and that the Line tnade eight Returnc, and paSsel tllros tsnro di&- ferent VVaIks. By tneans of t:ro Silk Loops I ad juEed two Lines in fuch a tnanner) that tlleir Ends were but a Foot dillance frotn one another) and f re- marksd tllat the EleArick Virtue uras {till colurnuni_ cated. I have fince that feeal in rlle Phi>f D427f NQ4t6, p 43It that Mr. GraJJ had the faLne tTllos>tlt, arld tllat lle had done the f:tne with Rods. rtlllS Xperilnent pUt lBe Up3n placing feveral diSer ent Bodies ltetweerl the tnvo LitlesX in order to exag tnine wtllicll diluinithed or irltercepted the EleAricitSr, and whic-ll gave no ObAruAion to it o I 11asre gisien tlle SGadegl an Accollut of tlze Particulars, rhrilicl I now otnit Ar the fake of Brenity.

Fifthlys I foSpended a Cllild on Silk Line} and Phigs C lnade a11 the furprifing Experitnents de N4I;.p,39 fcrlbed by Mr. Grv7. But havlng trsOd

tile Experilent upon tnY orn Bcedy ln tlle fatme InannerX I obLrerved SeveraJ tilingS very re-- InarkabXe. Fil{N when I take the PiRe-lDoMlvd C;F Stazd} on hichfthe Leaf-Gold is lald: lnto tnytHard neitler tNy other Hand nor tny Fce llas any At tradion. Bur if anotlaer PerSon, wtllo is in the C:ta>n- ber, cotne near tneX 11e will attrid it with his 51CCv his Hand, or even witll a Stick Secondly, wfhile I atn fufpended OI1 tlle LinesX if the eleArick frube be put near one of my Hand or Irjy Legs and tlzen if another Perfon approach tne, and paSs- his Hand within a-n Inch or thereabouts of tlly Face, Leg, FIand or ClofathsXthere itnmediately iffues frolul any bodr one or Inore prickingSizootsX vitllacrackling NoiCe,tllat cauSes to sllat Perfon as well as to xny felf) a little

pain

( 262 ) Paln reCembling that froln the fudden Prick of a Pin, or tlle burning froIn a Spark of Fire, whicll is asfen- &bly felt tllro' ones Cloaths, as on the (bare) Hand orEace. And in tlae Dark tllefe Snappings are, as tnay be eafilly itn.agined, fo many Sparks of Fire. rThefe SnappingsX or Sparks, are not excited, if a Bit of Wood, Clotll, or any other SubSance than a 1tw ving Body be pa{ied over the PerSon fufpended on the Lines, 1lnlefs it be a Piece of Meta31 whicll pro- duces very nearly the fatne Effe&. Any otller lis ing Animal doth tlle fameX if put on tlle Lines, andtl

(263 ) LeafwGold is frI} attra&ed by the Tllbe; and ac quires an EleEricity by approaching it; and of con- fequence is imlnediately repell'd by ir. Nor is it reattraflced, while itretains its eleflcrick Qpality. But if, while it is tllus fuflain'd in the Air, it chance tO light on fotne other Body, it firaighturays lofes its E;leflcricity; and confequentl) is re-attra5* ed by the Tube, which, after having given it a new Eleflcricity, repels ie a fecond time; whicll conrinues as long as the Tube keeps its E;leAricity. Upon apZ plyingtllis Principle to the various Expriments of EleAricitys one will be furprized at the Nutnber of obScure and puzzling Fadis it clear5 up. For Mr. Hagksbee's fumous Experitnent of tl:ze GlaSs Globe, in which Silk Tllreads are pazts is a necelfa ry Confequence of it. VVhen theRe TIlreads are ran ged in Fortn of Rays by the EleEtrlcity of the Sides of tlle Globe, if the Finger be put near the Out- Ede of the Globe, the Silk Threads within fly Som itX as is well known; whicll happens only be cauCe the FingerX or any other Body applied near the Glafs Glolze, is thereby render'd eleArical, and con fequently repeIs the Silk Tllreadss ^rhich are en. dow'd with tlle like Qllalitye Witll a little iRe fleEtiorl one may in the fatne tnanner account for moff of tlle other Phinogeza, and which feeln inexpliv cable without attending to this PrincipleW

Sevezthly Chance has tllrown in tny way ano ther Prir.ciple, lnore univerfal and remarkable than the preceding one, and wllich caRs a nexv L;gIlt on the SubjeEt of liledricity. This Principle is, tlaat tl1ere are two diRincS Ele&ricities, very different froln onse anotllerj one of wrlziclzi I call XJitreogs

M ln F,;eSrfi+

( 264 ) 'le&iricitt, andtlleother-rtlogs kileGrscxty. The firft ls that of GlaSc, Rock*CryRal, Precious Stone-s;I Hair Qf Atailuals, Wool, and many other Bodiest The fecond is tllat of Atuber, Copal, Gutn-Lacky Silk, ThreadX Paper, and a vaR Nutnber of other SubRarlces. 1 he Charaderi{lick of tlaefe turo Elec- tricities is, tllat a Bc)dy of tlle vitreszXs EleSrict for Exatnple repels all fucll as are of the fatle :Ev leEt:ricity; and on tllecontrary, attraEts a11 thofe of tlle refroUs FWle&iricifry; fo tllat t}ze rlrtlb lriadc eledrical, will repel Gl.aSs} Cryfial3 H>ir of AtlilnAlS, yG. srllen render'd eleArick and wil1 at tl ad Sllk, lnllreadX Paper, Sc. tllollgh rendersd cleArical likewiCe. Amberon tlle contrary will at. trad cleEtrick GlaSs, and other Subllances of tIze fhallAe (ClaSs, cand will repel Gutn-LacX Copa!, Silk rRllread, &ic. Turo Silk Ribbons rendered eledricaI, will repel eacll other g tvro Woollen tThreads will do the like; but a NVoollen flArad and a Silk Thread will tnutuaily attra& orje another. Tllis Prin(iple very naturally cxplain wlly t

( 26S ) attraQ?cs or repels it. If it attra&S, 'tis certainly of tllat kind of Eleflcricity which I call vitreoas; if on tlle cotltrary irrepelsX StisofthefaLne kind of Ele&riw city Witi the Silk, rthat isx of the reaozs t llave likewi{i obServed tllat comalunicated lile2ricity re- tains the fatne properies: For if a Ball of Ivt3ry) or Wood be fet Otl a G1aX Standy and this Ball beren-* der9d eleliridk by the Tubey it will repel all lucll Sub- Rances as tlae trube repnls ; but if it be rendered eleAricl by applying a -(zylinder af Gutn-T>ac neflr itS it will produce quste contrary EffeEt:, t?t2. pre clfS1y the thlne as Gutll-Lac would produce. In - der to {;lcceed n thei E;xpri-ments} 'tis retlIlilite that the two Bodi> which are put near one anorler to find out the Nature of their EleAricity be ren- dered as eleEtrical as poEble; br if one of tilem wasWnot X all} or but weakly eleEtrlcal, it wrould be attraflce{3 lzy tlae lier,. tllodgll lt be of that SDrh tllat (hould naturally be repal5ed by it. But tZle E;xperiTnent m11 always uccec1 perfaly x fince 'Qis So ja his Writitugs

t+nar

( 266 ) *that {took thePtefolution of applying my-felf tothz kind of Exwritnent

x have the Honour to be with the mofl; lzincere, md moA eEtuous AttachmenX

My LORD}

rO7W G tR X CD EX

MaM E#ble td gof

Obediex Sesevant)

D U F A Y*w

F Z X I &

Article Contentsp. 258p. 259p. 260p. 261p. 262p. 263p. 264p. 265p. 266

Issue Table of ContentsPhilosophical Transactions (1683-1775), Vol. 38 (1733 - 1734), pp. 1-470Front Matter [pp. 319-320]Number 427A Catalogue of the Fifty Plants from Chelsea-Garden, Presented to the Royal-Society by the Company of Apothecaries, for the Year 1731; Pursuant to the Direction of Sir Hans Sloane, Bart. Med. Reg. Praes. Col. Reg. Med. & Soc. Reg. By Isaac Rand, Apothecary, F. R. S. [pp. 1-4]Explanation of an Essay on the Use of the Bile in the Animal Oeconomy, by Alexander Stuart, M. D. Physician in Ordinary to Her Majesty, F. R. S. and of the College of Physicians. Vide No. 414 [pp. 5-25]A Catalogue of Eclipses of Jupiter's Satellites for the Year 1734. By James Hodgson, F. R. S. Master of the Royal Mathematical School at Christ's Hospital, London [pp. 26-31]De Sciuro Volante, Sive Mure Pontico, Aut Scythico Gesneri, & Vespertilione Admirabili Bontij Dissertatio, per Dn. Hans Sloane, Bart. Pr. R. S. Jacobo Theodoro Klein, Reip. Gedanens. Secret. R. S. S. Communicata. Vide Fig. 1, 2, 3 [pp. 32-38]A Description of a Barometer, Wherein the Scale of Variation May Be Encreased at Pleasure. By the Reverend Mr. John Rowning, Fellow of Magdalen-College in Cambridge; Communicated by Dr. Smith F. R. S. [pp. 39-42]Review: An Account of a Book [pp. 43-54]

Number 428An Account of the Experiments Shewn by Sigismund August Frobenius, M. D. F. R. S. at a Meeting of the Royal Society on November 18, 1731, with His Spiritus Vini Aethereus, and the Phosphorus Urinae, from the Minutes of That Day, by Cromwell Mortimer, M. D. R. S. Secr. [pp. 55-58]An Account of Some Experiments upon the Phosphorus Urinae, Which May Serve as an Explanation to Those Shewn to the Royal Society by Dr. Frobenius, on November 18, 1731, Together with Several Observations Tending to Explain the Nature of That Wonderful Chemical Production, by Mr. Ambrose Godfrey Hanckewitz, Chemist, F. R. S. [pp. 58-70]Observations of the Appearances among the Fix'd Stars, Called Nebulous Stars. By W. Derham, D. D. Canon of Windsor, F. R. S. [pp. 70-74]An Account of Some Magnetical Observations Made in the Months of May, June and July, 1732, in the Atlantick or Western Ocean; As Also the Description of a Water-Spout, by Mr. Joseph Harris. Communicated by Mr. George Graham, F. R. S. [pp. 75-79]Historia Terraemotus Apuliam & Totum Fer Neapolitanum Regnum, Anno 1731, Vexantis. A Nicolao Cyrillo, in Regia Universitate Neapolitan, Pr. Med. Prof. & R. S. S. [pp. 79-84]Observatio Ecclipsews Lunaris Romae Habita Die 1 Decembris, 1732, in Aedibus Emiminentiss. de V I A, D. Didaco Revillas Abbate Hieronymiano, Abbate Joanne Botrario, & Eustachio Manfredio [pp. 85-88]An Eclipse of the Moon Observed in Fleet-Street, London, Nov. 20, 1732, at Night, by Mr. Geo. Graham, F. R. S. [p. 88]The Bills of Mortality for the Town of Dresden, for a Whole Century, Viz. from the Year 1617 to 1717, Containing the Numbers of Marriages, Births, Burials, and Communicants. Communicated by Sir Conrad Sprengell, M. D. F. R. S. [pp. 89-93]The Bills of Mortality for the Imperial City of Augsburg, from the Year 1501 to 1720 Inclusive, Containing the Number of Births, Marriages, and Burials. Communicated by the Same [pp. 94-97]Remarks upon the Aforesaid Bills of Mortality for the Cities of Dresden and Augsburgh. By Mr. William Maitland, F. R. S. [p. 98]

Errata [p. 98]Number 429An Account of Symptoms Arising from Eating the Seeds of Henbane, with Their Cure, &c. and Some Occasional Remarks, by Sir Hans Sloane, Bart. P. S. R. [pp. 99-101]An Abstract of the Meteorological Diaries, Communicated to the Royal Society, with Remarks upon Them. By Wm. Derham, D. D. Canon of Windsor, and F. R. S. [Part I. Vide Transact. No. 423.] Part II [pp. 101-109]An Account of the Damp Air in a Coal-Pit of Sir James Lowther, Bart. Sunk within 20 Yards of the Sea; Communicated by Him to the Royal Society [pp. 109-113]An Observation of the Eclipse of the Sun on May 2, 1733, in the Afternoon. By Mr. George Graham, F. R. S. in Fleet-Street, London. Made with a Telescope of Ten Feet in Length, Fitted with a Micrometer [p. 113]A Letter from Mr. Stephen Gray, F. R. S. to the Publisher, Containing an Account of the Same Eclipse of the Sun, as Observed by Himself at Norton-Court: And at Otterden-Place, by Granville Wheler Esq; F. R. S. Both in Kent [pp. 114-116]An Observation of the Same Eclipse of the Sun, by Mr. J. Milner, at Yeovil in Somersetshire, Communicated in a Letter to Dr. John Allen, M. D. F. R. S. [p. 116]Nonnullae Jovis Satellitum Eclipses Bononiae, Observatae ab Eustachio Manfredi [pp. 117-118]A Letter from Mr. Richard Lewis, at Annapolis in Maryland, to Mr. Collinson, F. R. S. Containing the Account of a Remarkable Generation of Insects; Of an Earthquake; and of an Explosion in the Air [pp. 119-121]A Letter from Mr. Evan Davis to Mr. John Eames, F. R. S. concerning Some Children Inoculated with the Small-Pox, at Haverford-West in Pembrokeshire [pp. 121-126]Observations of the Variations of the Needle and Weather, Made in a Voyage to Hudson's-Bay, in the Year 1731, by Capt. Christopher Middleton, Communicated to the Royal Society by Mr. Benjamin Robins, F. R. S. with a Letter to Mr. Robins [pp. 127-133]Observatio Eclipsis Solis Totalis Cum Mora Facta Gothoburgi Sveciae, Sub Elev. Poli 57 degrees 40 54 d. 2 Maij, Stylo Jul. An. 1733, Dom. Birgero Vassenio, Lectore Mathem. in Gymnatio Regio Gothoburg [pp. 134-135]Proposals for the Improvement of the History of Russia, by Publishing, from Time to Time, Separate Pieces to Serve for a Collection of All Sorts of Memoirs Relating to the Transactions and State of That Nation: Printed at St. Petersburg, for the Imperial Academy of Sciences. By Ger. Fred. Muller, Prof. Hist. Petropol. and F. R. S. Translated from the German by Mr. Zolman [pp. 136-142]An Account of an Experiment Contrived by G. J. s'Gravesande, Prof. Math. at Leyden, F. R. S. Relating to the Force of Moving Bodies, Shewn to the Royal Society, by J. T. Desaguliers, LL. D. and F. R. S. [pp. 143-144]

Number 430Hermanni Boerhaave, A. L. M. Philosoph. & Med. Doct. Medicinae in Universitate Leidensi Prof. Colleg. Chirurgic. Proes. R. S. Lond. Necnon Reg. Scientiar. Acad. Parisiens. Soc. de Mercurio Experimenta [pp. 145-167]A Spirit Level to Be Fixed to a Quadrant for Taking a Meridional Altitude at Sea, When the Horizon is Not Visible. By John Hadley, Esq; V. Pr. R. S. [pp. 167-172]The Anatomy of a Female Beaver, and an Account of Castor Found in Her. By C. Mortimer, M. D. R. S. Secret. [pp. 172-183]Aris Terraeque Physica Historia, Anni Biss. 1732. Nicolao Cyrillo in Universitate Neapolit. Primar. Med. Profess. & R. S. S. [pp. 184-190]Review: An Account of a Book [pp. 191-193]Review: An Account of a Book [pp. 194-198]

Number 431A Catalogue of the Fifty Plants, from Chelsea Garden, Presented to the Royal Society by the Company of Apothecaries, for the Year 1732; Pursuant to the Direction of Sir Hans Sloane, Bart. Med. Reg. Praes. Col. Reg. Med. & Soc. Reg. by Isaac Rand, Apothecary, F. R. S. [pp. 199-202]De Camphora Thymi. Auctore Casparo Neumanno, M. D. Chemiae Profess. Berolin. & R. S. S. [pp. 202-231]The Settling of a New Genus of Plants, Called after the Malayans, Mangostans; By Laurentius Garcin, M. D. and F. R. S. Translated from the French by Mr. Zollman, F. R. S. [pp. 232-242]Review: An Account of a Book [pp. 243-257]A Letter from Mons. Du Fay, F. R. S. and of the Royal Academy of Sciences at Paris, to His Grace Charles Duke of Richmond and Lenox, concerning Electricity. Translated from the French by T. S. M D. [pp. 258-266]

Number 432Experiments and Observations on Bulbous Roots, Plants, and Seeds Growing in Water, by Mr. William Curteis [pp. 267-278]A Catalogue of Eclipses, of Jupiter's Satellites, for the Year 1735 by James Hodgson, F. R. S. Master of the Royal Mathematical School at Christ's-Hospital, London [pp. 279-286]The Case of a Man Who Was Poison'd by Eating Monks-Hood or Napellus, Communicated to the Royal Society by Mr. Vincent Bacon, Surgeon, F. R. S. [pp. 287-291]Descriptio Luminum Borealium Vitembergae Anno [MDCCXXXII]. Conspectorum. Auctore Joh. Frider. Weidlero LL. D. Mathes. Profess. Primar. Vitemberg. R. S. S. [pp. 291-293]Narratio de Erucarum & Locustarum, Quae Agros Vitembergae Vicinos Aliquot Abhinc Annis Vastarunt, Interitu, Auctore Joh. Frid. Weidlero, R. S. S. [pp. 294-296]Clausula Excerpta, ex Histori Variolarum quae per Incisionem Excitantur, ab E. Timoni, M D. Script, R. S. Communicavit Sam. Horseman, M. D. [pp. 296-297]An Abstract of a Letter from Petrus Van Muschenbroek, M. D. F. R. S. Professor of Mathematicks and Astronomy in the University of Utrecht, in Holland; To Dr. J. T. Desaguliers, F. R. S. concerning Experiments Made on the Indian Magnetick-Sand [pp. 297-302]An Account of Some Observations Made in London, by Mr. George Graham, F.R.S. and at Black-River in Jamaica, by Colin Campbell, Esq; F. R. S. concerning the Going of a Clock; In Order to Determine the Difference between the Lengths of Isochronal Pendulums in Those Places. Communicated by J. Bradley, M. A. Astr. Prof. Savill. Oxon. F. R. S. [pp. 302-314]A Continuation of an Account of an Essay towards a Natural History of Carolina, and the Bahama Islands, by Mark Catesby, F. R. S. with Some Extracts out of the Sixth Set; by Dr. Mortimer, R. S. Secret [pp. 315-318]

Number 433Conjectures on the Charming or Fascinating Power Attributed to the Rattle-Snake: Grounded on Credible Accounts, Experiments and Observations. By Sir Hans Sloane, Bart. President of the Royal Society, and College of Physicians, etc. [pp. 321-331]Part of a Letter from Dr. Richardson, F. R. S. to Sir Hans Sloane, Bart. President of the Royal Society, and Colleg. Physic. concerning the Squilla Aquae Dulcis [pp. 331-332]Schema Eclipseos Solaris Paulo Ante Solis Occasum Observatoe, Vitembergoe Saxonum Die Ildo Maii Stil. Veter. A. Chr. [MDCCXXXIII]. A Joh. Fridey. Weidlero LL. D. Mathem. Superior. Prof. Ordin. R. S. S. [pp. 332-334]An Abstract of the Meteorological Diaries, Communicated to the Royal Society; With Remarks upon Them. By W. Derham, D. D. Canon of Windsor, F. R. S. [Part II. Vide Transact. No 429.] Part III [pp. 334-344]De Ambra Grysea. Auctore Casparo Neumanno, M. D. Chemioe Profess. Berolin. et R. S. S. [pp. 344-370]

Number 434De Ambra Grysea. Auctore Casparo Neumanno, M. D. Chemioe Profess. Berolin. et R. S. S. [Vide Part I. No. 433.] Pars II [pp. 371-402]An Account of a New Engine for Raising Water, in Which Horses or Other Animals Draw without Any Loss of Power (Which Has Never Yet Been Practised) and How the Strokes of the Pistons May Be Made of Any Length, to Prevent the Loss of Water, by the Too Frequent Opening of Valves, with Many Other Advantages Altogether New; the Model of Which Was Shewn to the Royal Society on the 28th of November, by Walter Churchman, the Inventor of It [pp. 402-404]An Abstract of the Meteorological Diaries, Communicated to the Royal Society, with Re-Marks upon Them, by W. Derham, D. D. Canon of Windsor, F. R. S. [Vide Part III. in Transact. No 433.] Part IV [pp. 405-412]An Account of the Dead Bodies of a Man and Woman, Which Were Preserved 49 Years in the Moors in Derbyshire; Being Part of a Letter from Dr. Charles Balguy of Peterborough, to Cromwell Mortimer, M. D. R. S. Sec. [pp. 413-415]Review: An Account of a Book [pp. 415-416]

Number 435De Ambra Grysea. Auctore Casparo Neumanno, M. D. Chemiae Profess. Berolin. & R. S. S. [Vide Part I. No 433. & Part II. No 434.] Pars III [pp. 417-437]Editoris Recensio Experimentorum Circa Ambram Gryseam Domino Joh. Browne, R. S. S. & Dno. Ambrosio Godofredo Hanckewitz, R. S. S. Institutorum, Cum D. Neumanni, R. S. S. Experimenti Sui Vindicatione [pp. 437-440]An Account of Mr. Thomas Godfrey's Improvement of Davis's Quadrant, Transferred to the Mariner's-Bow, Communicated to the Royal Society, by Mr. J. Logan [pp. 441-450]The Description and Use of an Instrument for Taking the Latitude of a Place at Any Time of the Day; By Mr. Richard Graham, F. R. S. [pp. 450-457]An Abstract of the Meteorological Diaries, Communicated to the Royal Society, with Remarks upon Them, by William Derham, D. D. Canon of Windsor, F. R. S. [Vide Part IV. in Transact. No 434.] Part V [pp. 458-470]

Errata [p. 470]Back Matter