Ø€ônProduced by Suzanne Lybarger, steve harris, Josephine Paolucci and the Online Distributed Proofreading Team at http://www.pgdp.net. OPTICKS: OR, A TREATISE OF THE _Reflections_, _Refractions_, _Inflections_ and _Colours_ OF LIGHT. _The_ FOURTH EDITION, _corrected_. By Sir _ISAAC NEWTON_, Knt. LONDON: Printed for WILLIAM INNYS at the West-End of St. _Paul's_. MDCCXXX. TITLE PAGE OF THE 1730 EDITION SIR ISAAC NEWTON'S ADVERTISEMENTS Advertisement I _Part of the ensuing Discourse about Light was written at the Desire of some Gentlemen of the_ Royal-Society, _in the Year 1675, and then sent to80ir Secretary,%¨A& u(ir Meetings Øthe rest was added about twelve Years after to complete84Theory; except,third Book, Q½ lastA¯ posiAM11dSecond, which were since pogether Œàof scatter'd Papers. To avoid being engaged in Disputes a Êhese M@s, I haavi_ to delayeihpAqing),should still5 ,$it, had no ÷(Importunity­ˆFriends prevailed upon me. If any o} Ë writ on!=Ds Subject are got -my HaT they$ imperfect ­%@perhap R$ten beforeópd tried all the Experiments h%|et down O,fully satisf7my self9S Laws of �&EnCom.êC‰$.…!xlhpublish'd what I think propUhe abroaA!ish!ãt,it may%z$be transla¡into ano%Z0Language with!C\my Consent._ _The CrownäQ‹sometimAAppearõSunåMoon, I EK endeavourAF|o give an Account of; but for waH sufficient Observaa s le!$éI±aube farØ examined.a} Q,of aÈTu}1m$also left ].Aµhav%Rbi•I!Vß!© en I‰'yW ¦(s, nor repe%Œ!Ba thoseLdiA…y, until¤dFc�€aI¨8ir Circumstanceiø$communicat]AAÑA ied,!¡ 1I�Þto Es%†1NEnqui‘isp0my Design in M¤%'�Bm®E?In a Le�’e¾alHto Mr._ Leibnitz _iaÓe yAC 1679šQüed by D2(Wallis, _I a�0ion'd a Metho:1��sfound)ageneral ¥ˆemsM¨squar·Curvilin€(Figures, or!?p " theme#  Conic¡—ƒ +%5 si¡ústJ 7 š…”a–be Á"arA¢An ¨ÍDgo I leautà@anuscript containµ suchÒ)2M­Émet {EdT! s cop�¥Xof¥žI ±VOccasi¡„ade�D%Þck,¡¤fixztoan_ Int¸ !,, _and subjo ¢Ha_ Scholium _concerºi¶%µ.ý „ 8aAith it ‘£smAã Trac%FeN¹Øaäé5 Kiý:áºaéÁHAŠ many9u)Døknownè!< ͦ�öo!de solici¡Mkmak!it1-Aû š_I. N10April 1, 1704� AdvertisG I Z Íü Ed.($se Opticks1Q omit¥MaAÄ atica !Ms ¯Å^aéŸEnd1@formerc , as¥belongïto¥L­[)ÉFGJk< )Y QuesA;s >to shewI I dor take Grav4Áan esÁ¡ial På N BodiaºMO i one ha?Q?8its Cause, chus ÒåY¡Šit‰ wa¦aA, bec5 I amŸ yet ùþ©òi6Ä*B!éšYJuly 16A17FtoIFourth1²å¼is new!ÛHSir_ Isaac Newton'sU6_is careÓã ed fromEç)ËMtEi corr± !4a Author's aFŽ ä å`j ›Death‰¤6 seller. Sà ­'s Le…ge °æ, _©Vh blicklyÄ ÍQUniversA94of_ Cambridge Ñr©q1669,Áy0‰1671,; 1 ly1 ,ñhas beea‰oughtE3Œ mAªmbottom!rÛ Pages sevÁ‡ CitÆ5\nce�^ò É;<Demonstr 3' )g qæ õse_1Ñ. Ql*Mtb TranÁebe!¹Note:; re% »greek låÑ s usH ' de>peÏ÷ illuºŠ ’ :ifÁ‰by [GT: U ]. Sá—e roots}no�Åbyh|sqrt MM! equ%"¶õHHE FIRST BOOK OF OPþ _PART Ia´ M*òioA¯ & to expla)ƒÄ ¡»e% LiA'by Hyp's�¤è t™ppro› jby ReasoD E&‚ : In ordIqIÿ I shá"premise%follow�ÕDefinÅ'v AxiomA _DEFINßS_ . I. _B)oRayÅI underc d¥Ble´artƒÉ 8as well Successè -same Lin!ask teary#Qh",._ For it isá¬ifW >L%Tconsist¡ „both w“Coe;µÂ.‘ place youe stop g)acomes ÁImox ‰&let passB*!‰ÁŸly;… o %4 6nit!�g�fYiiA.%% par< - ³isÆp'd canA£he)€b <.Îe¦-×)eor6b‘‚‰© !-galºZ] k.of KT propagý 3do orì er%çg! ¥RS d!ðàor ,er¨¾caaA†‚á=DAô. IEæ”ngibilÉ&g2õ,!Mtha 0œtoÅ refK ed!'turÀ ! ÷ir WaEØ!ÀaŽ !+t¡q(parent BodyBMed- ¢ÿ  a¡z ater&less Bº ¶n­ mêor G ‘ à ­( like IncidÁ™srM; ¢._*P ianÁ ua e“…Ÿhe’! %|)2iÚá¦c’ "^luminousÆ y,!ð! ÁFminA3i-yª %lµ !:Mëbenôor bre¤ ,î saR úJ  ê6Œ « thu��y p¡º%Œžs}1ciq˜be]û eË in¡Jt. Bup  rgu�d÷ n9ÆÍà%Q!�Es Ñe Eclips!¬f _Jupi0s Satellites_½seþeú)”is }‘¡ime, sp-<in¥ç!age�ß to uK ¡¸n MinO• ime:Ý �&^ ve c!­^ dÁœe5H2"inâ¼ ter¹)zaˆ� Æn©ø caseÅÛuäqålex}äA)r*refà.× backI!~¥ÈM#EÄ¥¼ìÊwì SurfÁaÿ falliÕ‡á2’| xibl ì â�\…/¡0…(easily._ AsYm!°qÛ a GlÉ>to AiriDby inca dVEÎ_!\çAonÁ!Ùhe QAúP begi^tµgth=a„ot…Ñc!Mà atO;.soråĉ0©îM:‡!LmospiouslyÅFby Ρj¨%až soon>¡· B›ï T¡ÓE.le..V   Angl³µ!É at ñ€Æ  bÛthe¤¡ZtŸ�,Ñ&5Pere~ culaÖ øÙ?ÅvQ[w Poi7fž.*Ù FÅRAéx¥Fr ÁÍi²iØe Ó-“ˆA+ë Òži/­šed.àet&é †âEjâ 5€2âeñ!¨Sd A±(,á!ÛàA½¹·)ÿá7!ª%ì¢E6ˆ¯ˆ‰¢‰E�AÇšEà„�aïI´SB, Homo»al¯SimilaO ¥Ä:V­i¾Vè nŸÔ {uHeter.f Diss i._s mer È ¢šÐˆ cw affirm¹ so¡Ê0all respects,ü H!t%m÷¥Ùin™ ,­òat°s- l áøéé}{ RIacs“Áßhe * iscours.êVIÉ5!¼“AFò)Ò9L PrimB#v )Æý  of6o%Ss,6A™1Ÿ._  VI8wayÆmp!¿aq² c=cY6 a(; as will a¦).$. _AXIOMSEÐAX!y™8°Eo , lieaâ !àå,Plane wiÁ•YB©ouÄp%oisêlÁd‚HII)"6—b�µíTdi¾lyé]NeµI™gA j>f¡, 3¥î’rõ9Y¥‘9>ñ³Ù rare"L  dens!dÁÉ ward¥¬6Wá\at .s Í .RÀ¡úbð ÈÛe‰÷!wµ;²±A ¡(2#“e+ accurz Ô very [l a÷n R®1nN9 rWh€ Ö…îaÛor³£H yEnIÉVéaêiÄ åj, 'tis7…?è l] ioÊM³re«e*’ klld 6ú< MgÁ¹½ &d¡g"‘u« !Ðñ!‡|’ Air)÷W÷ ,. 1'5˜ˆGQeí!†M�-ég as 4 to 3c>m+ m@Ÿ as 17W11. In jof�±&‰us$¹�)µs:¥ù&differ)Ý$s so littlºA³t needFdom!&P . [I*U4: FIG. 1] Supºƒ o Æ`at RS [in _Fig._ 1.] repr¡e7"B of stagABng1vI at C%ZjBb AÉl RayÛD­h!Ê# A…*ASÙ ¡Ê"ö8yI éNAëbÛseõgoe!ãÜÛ9ð: I e�à� Â3 Í;E` ¡JàaK6´ CP¡pý' down�‹o Qd ó ludeø e first�-�qRa(¶ ÃþÄ, ìbá¼Õw.-cÅ]Ñ•äy'ACP­ d. Il ˆ �I.9Bê¥AØ`SD;¹#iÕ_2Ðb÷ iIz ADaEBµ‘DBÓ¹ÅÏAD)7draw CBâisI0CB5“Y: Ray;Œúù0B-«�ÅBDù NG·n6êêº ðB ©  s‰U,Ç)F Á` nH,9H­0eAD¸.}Y .5—MXÁ÷( Љ® å³d)�Ì3>4™ °KCen_C!6WA=¸$ Radius CAñãaéa{!le ABE,º! a paralle%ÝNDQ®¡ ne HE cutÅ8ŽË!µ%n EE #rCEAZé—ena Å…¿.è-¿OnLAscro% is-*yÕ:ã# ACB ýk2.k!_ ]åH ¨løits ØþvsÁØ edgeå¶r•Ó «ôgthr�© itv t DE®,A–" £Éš&ÿPrA AC Åh…‡ ggo8MsE+EÁ¡p}Â*® -R¡6Ÿ E%}Da&s  find EF©6]²n0!¦t!Xå*!Ûm  ñ©¸ .òË B ò<ò out, ŠU next™Z¸ FG–é ”c¥èP-.‡!1!"17‘¶.+D:Ä É�22V_¡Hí 2šO+ M€ È mus‚*e�‘t¸nk È,!"ïý+å5ZÒ 2.] MuchÞ 6G�» ACBD.Ü 3:q» spherõ#lmvex° '!þ s (u»Á­P'_LeØ.b&!ˆõ' Bu½%-gMoSÏ acle an O—+ !S,a Telescope)2 0 reS( *á howMqÁ“AÌeŸL#‚"\ lucid ¢ QÙˆÕã,ÅÒQM&ã 2RW, DM  �1+"# ACBÉ}by F —a: mÆ%o at%¬ `}3 c«a¤ MNY!ÜV.™.¥bÅ’aÝin goŒIü…Ÿ €b� `%@N Át–*…Joiÿ:Ž N_q_‚�u“ aî.üIœ }p™+á=¡NnAcAYcoQ“Á¼A’�  pÅ-ƒ)nc5’žE~] YÍZN3aN\ *#*| flowé[s©#Pì IÅnyMÙ)OAQ B6 r alDNP B³ %¹r±Æé>ƒü %ka dÕ$�so Æ(% ±,Jp•Y'o!Ÿy (O'%€Nto 6$Pý,VÕ A|Ö sens¯ Error$É~hnv )z— : . s";"šy p oÿK orèPQ'S>8sA©Ç)×wb %ò1DRo ä 5AƦ+©c_Focus_¾Aã�E "Wbß ã.n,„£!'M:òAÿÜu,bye±A t6‹o1%l¢ above;ÑmàË2iQ hua_CaO#�HACB.94.]va›r9Œ%hO Q�jùi Q_q_Cõ .Y Aˆ�à O)FiáÖ 2)A½\Ì _q_&%Zbe&8QCéÄ)ê�Å"¦!p2¤9}!9: Or if4Ctk*n‘kåo…‘À ¶Eús> n?o–úCá1wÓ*¨Í(¹¿ š¿&V!ØN4�î-ñ2É9:ñ5)ñ§-!å*a×eSe dräE. Bisy3n!šeof, (s‡EC)Á¦TIifò !ü A­Ð9e�)T%!Œs Q!q 2 TQ, T Tb– in˜ ùTalM—e Q,22Ã%— ”bVå{-EaÓn� N—5=—3R—62—!é²—l1B“ EC€dé)B%^ET� C_t_&oá‡z/Aãí ½ 9XIÓataœ ˜ ª$aÛ[ ¥$&ö XYÿ haO.*@os B‰/ÇifA[!½E?ÁÍE3ßÞ Á,PÅ¿I7!¿™AT)ü o ET²Eÿto _t�ft($ %Ûq1r�( .‰ /ÉJTQîth Uëš jGUf!¢ÆfS0vf6Afœ á3ñ…me£%ˆ ¡YÅKñU"=se"9¨6ŸZk 7€�}4Uæ2¨ 7Iç!  Aç y$"® ·)® r&*ì r­…on—¡¡‰dÍCÝÒ Axià ÃïE()º cutsiþ �ùs>· XX“WJ©EÕ©*s,)EÙ“is ‚ÕÆžF _f_�|iIç eò¨~5é±2áØU"9 Q=u›'&þ �!H,.þ ¦e,!¯ X Diamž Fš¥Ü×tÈ"ã. S­ânoª1arPanEïTYg!å²Ep. DQ6ïsaid ôl¿  T!)ai)‚Å^!W`/aš!d…‹proý} _t_E4or TE‘[ TQIŒ>£!vÜ [*eómÛbNMÌ1Á" !6" ,·vi¾†=;È*so remot*m'!µ, n¬ he)áso ô9A"tÛ k8 é*$eÚ¤ ( too obliquH on…Ž «awQü.[A] .9) OperRiü[Íì<6$ Jœ :í ¡� FociE˜ Á%Ù by a Õú rmÿe§ È W1{ Ö¦ t÷o¹;P"Å-(please.[B]