Front Matter Source: Philosophical Transactions of the Royal Society of London, Vol. 68 (1778), pp. i-viii Published by: The Royal Society Stable URL: http://www.jstor.org/stable/106310 . Accessed: 15/05/2014 07:51 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. . The Royal Society is collaborating with JSTOR to digitize, preserve and extend access to Philosophical Transactions of the Royal Society of London. http://www.jstor.org This content downloaded from 194.29.185.71 on Thu, 15 May 2014 07:51:29 AM All use subject to JSTOR Terms and Conditions
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Front MatterSource: Philosophical Transactions of the Royal Society of London, Vol. 68 (1778), pp. i-viiiPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/106310 .
Accessed: 15/05/2014 07:51
Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at .http://www.jstor.org/page/info/about/policies/terms.jsp
.JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range ofcontent in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new formsof scholarship. For more information about JSTOR, please contact [email protected].
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The Royal Society is collaborating with JSTOR to digitize, preserve and extend access to PhilosophicalTransactions of the Royal Society of London.
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T H E Commite appointed by the Ropl kit tQ diredt the pul- L lication of the Pbiwhical-tra<on5, take this opporamity to
acquaint the Public, thae it fullyappears, as well from the councilobooks and journals of the SocietS as fXm repeati decIarations, wllich have been made ia iveral brmer XnJaSions} that the printing of them always, fiom time to time, the fingle adt of ehe rerpeEtive Secretaries, till the Fortywfevellth Volume: the Society Xas a tzody, nearer interefting ehem- ilves any firther in their publicatioll,tthan by scafionally rewmmending tbe revival of them to foolle of their Secretariess when, from the particular
circumRances of ttltir aMa-trs, tlle fiv}ans had happened for any length of time to be intermitted. Alld th;s fEems principally to hare bevn done with a view to fatisfy the Public, that tlwir nfual meet!ngs were then continuetl fa the ;mprovement of knotvledFand teneSt of mankind the great entls of their fir{t inRitutlon by tbe Royal Clwarters, anel wllsh they have crer flnce Readily purfued.
But tlle Society beilog of late years greatly inlarged, and their com- munications more numerorlS it Was tkght Yiiable)* tiat a Committe
of tllcir mclnbers flould be Xappointal to reconfider tlle p.lpers rcad be- bre them) arld IcleEt out of them fuch; as tTley Ihould jtldge mofE pro- Izer for publication in tllc future lk9Sions; wrlich WaS aceodingly done upon the a6ttl of March t752. And tlle vunds of tIxir choic- are, and will continue to be the irnportance atld fingularity of the fiul>- jaw, or the advantat,eous manner of treatill,g them > without preteneling ro .allfwer for tlle certa;Xlty of thc tI&S, or propriety of the revlfonilogs, colt-ained in tlle iveral papers fo l)blialtd} YYll}Cll lllUfi Rill reR on tlD
cre4lt olX vtudt;,ment of their reflz2ivc +.ttlthors.
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t. w 1t is liketvlSe necefl"arsr on this occafiotl to remark, that it Is an eEa
blifhed rule of the Society, to which they will always adhere, never to give their opinion,es a body, upon any f^tlbjeEt, either of Nature or Art, that comes before them. And therefore the thsnks, which are fre- quently propofed from the chair, to be given to the authors of fuch pa- pers, as are read at their accuIlomed meetings, or to the perfons through whofe hands they receive them, are to be conGdered in no other light than as a matter of civitity, in return for tlie refpeEt ihewn to the Society by thofe communications. The like alfo is to be faid-with regard to the feveral projeEts, inventions, ansl curiofities of various kinds, which are often exhibited to the Society, the authors 57vhereof, or thofe who exhibit them, frequently take the liberty to report, and even to certify in the public news-papers, that they have met with the higheR applauSe and approbation. And therefore it is hoped, that no regard will--here- after be paid to fuch reports, and public notices; which in fome inftances- have been too lightly credited, to the diffionour of the Society.
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I. 3 LETtER fom Sir Willialn EIartwiltolz K. Bt F. R. S. to Sir John Pringle, BarZ. P. R. S.<gisx<
an Accoxt of certsn larvces ff ZOIC8GS a>Z- the Banks of thc Rhine. ?age I
II. Of the SIeat, &c. of Jxisnals atxd ZeWetables. ty Mr. John Hunter, F. R S. p, 7
1II. lshe Force of Red Ggn-powder, and the initial VeMocties; of Cannon Balls, determined byExperireents; from whic,3 is alfo dedzgced the ReAation of the initial Zelocifoy to tffie DVeight of the Shot and the tantity of P. owder. By Mr. Charles Hutton, of the Military As6zdemy at Woolsvich. Comsnsnicated by Samuel Horlley) LL.D. SecOR. S.
P 5° IV. X n CvfS in Sq2vintinW, by EraEmus Darwin}
M. D. F. 1Z. S.; communicated by Thomas AIzcle, BHq. R R. S. p. 86
V. A Cgre of a Mv.fcxlar ContrvE-ton, by EleErxcy. By Miles Partington in a LetXer to William Henly 1F.R. S. p 97
YI. An
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vl C O N T E N T S VI. An Accognt tf a hXe Stone sfevr Cape Town. In a
Iztter fRo Mr. Anderbn to Sir John Pringle, Bart P. R. S.; Eh a Letter Rom Sxr William Halton K B. E: R. S. to Sir John Pringle, on hvsxng feex pieces of tXefiaid Store. p. to2
VII. A Letter frotn Nathaniel Polhill, E/P. Member of Parlismentfor tbe Borough of Southwark, to MF. John ]3elchier, F. R. S. on Mr. DEBRAWS trents i he Citz4re of ]3ees. p. I 07
VIII. AMn itroved Method of tanntg Leather. ty Davitl Macbride, M. D. conxnicated ty Sir John Pringle, Bvrt.P.R.S. p. TIT
IX. O9rtSxons on the Pot41a/on and Ds qf Chef- ter, n the Year I774. et J. Haygarth, MX D.
p. I3I
X. Sn Sccozt of Ame F Expertfnents, ty Mr. William Ssvift, xn a Letter to John Glen King, D. D. F. R. S. p. I55
XI. An Sccowat of the I/Rnd of Sumatra Jyc. Ey Mr. Charles Miller. COMMUXt'CGZted a E<lward King, EJ. r n a r. . o. p I60
XII. X Meteorological DtaG &c. kept at Fort St. Gerge in be EaR Illdies. t M. William Roxburgh, S0>- tatnt-JSrgeox zo the HoJpizozl at theXid Fort. Commuo ncatal by Sk John Pringlet B<zrt. P. R. S. p. I $6>
XIII. Experimerts qpsz Slif, a>d the efedEs of different kis of Cov ton Xts 5XB at Wrork. t W. Whitet M; D¢ F. S W. Co?ZaXnicczZed Qy John l-vthergill} Mt D. F2. R. Sc p. I94
7 X1v.- Afa
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XIV. An Sctoant- of the-E,arZhquake zuhch waw feA at PdancheIlcer ard other PAacer, oz the I 4th Day of Se1)- tember, I 7 7 7. Ir a LeZter f R om Mr. Thonas Helll-y, F.R. S. toViwilliatuDatfon,A1. D.F.R.S. p. 22I
XV. Sundry Papers reAatise to an Accident fr4m Li<C/vt- eing vZ Purfleet, May I 5, I 7 7 7. 23 2
XVI. On the Arithmetic of ImspoffibAe tarntities. By the Rev. John PlayiLlir, H. M. Cotzmunicated by tZJa ReGv. Nevil M.aR^elyne, D. D. F. R. S. axd XJ?rona>Se-r JRoyctl. p. 3-x 8
XVII. RefSeAions on the; Comrrgunxcation of Motian by Im- pvAt and Grcl.*vity. By tbe Rev. Ifaac Miluer, M. iC. F. ellow of Queen's College, Cambridge. Communicated byo Anthony SllXepherdX Du D F. R S. and PAamian Profe0or a Caubri(lge. p. 344
XVI1I. Obyervations ion the Limxts of Alggbraical Eryva Xions; and ageneral DemonJ?ration of Des Cartes's-RvAs fpr >ading their Namber of affirrstaZise and negative Roots. By the Rev. Ii:aac Miltler, M. A. Fello7m of Queen's Collegej Cambridge. JCommvnicated by An- thorly Shepherd, D, D F. R. S.. and PIuasian Profefor at Cambridge. 1) 380
XIX Wgogrnal Qf a Voysge Zo The Ea* Indies, in the Ship Grenville, Capt. Burllet Abercrombit, ix he Eear I775. ByAlexanderDalrymple, Elq. F.lZ.S. CoX- municated by tZJe Hon. Henry Gavendifli, F. R. 5.
p. 389- XX. Sn Efay on Pyrometry and Areounezry, and on PZJY-
gcaZ Mealgres in gener/. By Johll Arldrew De Ltlc, F. R. Ss px 4T 9
a4 4 XXI.. Ex
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SXI. ExtraS of a RegHer oJf the Barometery lXermotwt ter sxd Rain, at Lyndon xn Rutland. By Thomas Barker, E>q. Cofnmxnicvted by Sir Johr<- Prlngle, Bczrt. P 1?. S. p. g 9 4
SXII. yournal of tbe WevtXer at Montreal. By lkIr. Barr. Commasnicated by Ricllard Saunders, M. D. F. R. y.
}! 557 XXIII! ExtraS qf MeteorologicaZ Obfersatons snade at
tawkhill, nevr Edinburgh. ty John !\I'Gouan, CommgnicaZed by Sir John Pringle, P. R. S. p. 5 6 2
XXIV. ExtraNt of a Meteorological yournalfor the Near I777, kepX a BriIiol, by Samuel Farr, M. D. p. 567
XXV yogrnal of the tvantity ff Rain that fell at Holme, near MancheRer, frogs T76s to I76g; andS at
P
barov y, nevr Leec s, Jroass I 7 7 2 to I 7 7 7 . By
George Lloyd, Efq. f F. R. S. p. 5 7 1
X Meteorolo,t,aical yourn al kept at the Ho sJ e of tbe RoyaS Society, by Order of the Prefident and CSoxncil. p. 57 J
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Asadetnies of BrufFels and Caen, axd CorrepondenZ of the RoyaZ Scadeffly of Sciences at Paris. - p. 637
XXXI. Ob/¢erzv4hons on the Scxrtsy. By-Charles De Mer- tans, M. D. D4ted vienna, Jan. x4, I 778. p. 66T
XXXII. Amparin bePeen Sir George Shuckburgh and Colonel Ro?s Rales for the MeaHurement of HeirDts wSh the Barometer; in z% Letter to Col. Roy} F. R. S. from Sir George Shtlckburgh, Bart. F. R. S. p. 6 8 t
S XXII I. Sn Xccouxt of the Calvalations figade from the Svrsey and-Mea0gres taken at Schehallien in order to aJcertven the meun DenJity of the EarCh. By Charles Hutton, E>q. F. R. S. p..68g
XxXiV! . n Hscoun of the Sve Sbark, togetber with a Drawing of tbe J¢nze. By W! Watfon, ">X. M. D F. R. S. p- 789
XXXV. SDeJArfitxon oJ7the Exoccetus Volitans, or EEly ing Fifll. .By T.homas Brown, S2rgeon, xear Glafgow. Commgnicated by Dr. Fothergill, F- R. S. p. 79I
;XXXVI. ReaJtons J?r- dennng from tbe Repo:rt of the Coanmittee vppointed to con/ider of Mr. 57VilSon's Expev ments; *<>acZding Rer?arks on Jome E3Speriments eJc- hibited by llI.r. hairne. ty Dr. Mufgrarre, vF. R. S.
p. 80I
sxxvrl. Expenments on EleEricity, be*ng an Sttempt Zo Jhezv the Sdqvtv,We of elevatH pointed Cond>Sors. By Mr. Edward Nairtle, F. R. S. p. 823
SXXYIII. On the Ufe of an Smalf,octan of Zinc, for tbe Pxrpoge of eleSric4I Excatation, &c. By J8ryant Hig- gins, M. 1;). in a Ivetter to Richard BroEkleIby? M. D. F.R.SZ p. 86t
XXXIX.
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XXX IX. Chetnical E3cterigents and Ob.Jerevatons on .Levi Ore By Richard Watfoo, D. D. F. SR. 5* in a Letter to Sir John Pringle, Bart. P. R. S. p. 863
XL. IDefcription of a tnoJ? e.eNtual AIethod of J2car>Zg Btldings anJ? Fire, rqpented by Charles Lorfl Vzfcosnt MahonX F. R $. p. 8 8 4
XIJI. X Met/vod offindgngX by the HeAp oUrSt Ifaac New- tOIl'S binomial theorersX a neu Valvie of the serySowly- GonM3erging inginite Serees xJr 2 + S + 4 + S +ac.when X is Xvery nearly equal to I. By Francis A¢aferesX Ffiq. F. R. S. Cv.rJtor Baron o f the Exchequer. p. 895
xLIt. AMetbod of extendirg Cardan's Rule for re.foltvenW one CvMe o.f a Cubick Equation of thas Form, X3 %- qx -r, to the otber Cafe of tbe Jame Equation, whicD it is noz natxrdlyXtted to fofset and whicb *s the.tefore of- tren called the irredtlcible Cafe. By Francis Maferes, E>q. F. R. S. Curftor 13aror of the Excbeqser p soz
XL III. Accoun of tbe HdqJantages of a xewly*nsentecS Machine mt4ch MUari@az Xn its EfsX and sery sfXfzzl for determining the perfeA Proportion between derent Moqneables aAing by Lezvers and liVheel vxd Pinion. ByMr.LeCerfX Wanch-makercltGeneva; CotnnS- nicatediby Lord KiJaount MahonX F. R. S. p. 950
XLIV. Nezv Experiments zwpon tbe Lewrden Phxczl, reffeS- g the lsersnino/tion of ConduSor. By Benjamin Wilfon,Efq.F.R.S. p. 99.9.
XLV. Obferqnations on the Solar EcliSfe which happened .une Z4, I 778. t Mr. William Wales, F. R. S. and
MaUler of the Roy6z1 Mathesntic/ School in ChriPcfls lIefpital. p. I O I 3
SLVL
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viii C O N T E N T S. XLVI. Sx EclipJe of the Sgn yuxe a4, t778, o-bferqved at
Leicefcer. By tbe Resw M&. Lu-dlam, Vicarr of Norton, zear LeiceRer; somzmunicated by the A0cronomer Royal. p. I O I 9
XLV1I. X ready May of ligbtxng a Candle, by a very mo- derate EAeSrisql Spark. By John Irlgenhouiz, M. D. F. R. 5. p. I 02X
XLVIIt. EleDrecal Experxments, to enctlain how far thc Pbenoanenu of the EleArothorus may be accounted for by Ds. Franklirl's iJheory of poftiXve and negative Elec- tricity. By Jolln Ingenhoufz, M. D. F. R 5. pa I037
XLIX ObJfe>9tations oznd Experim-ents tending to conCrm Dr. Ingenhotlfz's lJheory of the EZeArophorvs; and to
J2vew the Impermeogbility of Glafs to EleEric Flvid. By William Henly, F. R. S. p. I049
L. ivrack of Hs Maj^e/?y's armed Brig Lion, from Eng- land to Davis's Streights and Labradore, witX Ob/erqva- tions for dezermining the LonWitude by Sun snd Moox and Error of common Reckoxing; arlJfo the Zariation of the Compvgs and Dip of the Needle, as obJ4erflved during tJue fiaid Voyage in T776. By Letenant Richard Pickerfgill, late Commander of thefiaxd Zefiel; comF municated by Nevil Malkelyne, D. D. F. R. S. axd XJ?roromer Royv. p. Io57
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