PIX4590807: Constellations of the Great Dog, Orion and Hyad Cluster - Constellations Canis Major, Orion and the Hyades cluster - Winter Constellations. On the left the constellation of the Great Dog with the star Sirius, in the center the constellation of Orion, on the right the cluster of the Hyades. Winter constellations, from left to right: Canis Major with Sirius star, the constellation Orion and the Hyades cluster / Bridgeman Images

FLO4590817: Portable eight-day clock mechanism, early 19th century. Copperplate engraving by Wilson Lowry after a drawing by John Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1812. / Bridgeman Images

FLO4590850: Plan, elevation and section of an air vault, early 19th century. Copperplate engraving by Wilson Lowry after a drawing by David Mushet from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1805. / Bridgeman Images

FLO4590903: Section and elevation of laboratory chemical apparatus, early 19th century. Copperplate engraving by Wilson Lowry after a drawing by W. Duesbury from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1812. / Bridgeman Images

FLO4590969: Dial work and striking part of an eight-day clock. Copperplate engraving by Wilson Lowry after a drawing by John Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1808. / Bridgeman Images

FLO4590971: Human skeleton from the back. Copperplate engraving by Milton from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1820. / Bridgeman Images

FLO4590988: Anatomy of human musculature, 1820 (copperplate engraving) / Bridgeman Images

FLO4591071: Gem and cameo engraving tools and equipment. Copperplate engraving by William Blake and Wilson Lowry after a drawing by J. Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1819., Blake, William (1757-1827) / Bridgeman Images

PIX4591083: Constellations of the Great Bear and Hunting Dogs - Constellations of Ursa Major and Canes Venatic / Bridgeman Images

FLO4591091: Ancient altars, ark of the Covenant, Chinese musical instrument Ching and King, John Napier's calculating bones, and ancient arithmetical characters. Copperplate engraving by Wilson Lowry from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1820. / Bridgeman Images

FLO4591145: John Isaac Hawkins (1772-1855) 'patent polygraph machine or autopen. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1810 / Bridgeman Images

FLO4591221: Coach suspension: view of the fore wheels of a crane-necked carriage and Mr. Jacobs' contrivance for the forewheels of a coach. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1818. / Bridgeman Images

PIX4591228: Constellation of Big Bear - Constellation of Ursa Major - The constellation of Big Bear with the constellations of Hunting Dogs and Little Lion. Ursa Major is the third largest constellation in the sky but is not seen by skywatchers in the far southern hemisphere. However, it is the most recognisable of all constellations for those who can see it, mainly because of the asterism formed by the seven brightest stars. This is known as the Big Dipper in the USA, the Plough in Britain, various kinds of carts in Europe and a range of other objects in other cultures. Not surprisingly the constellation as a whole has a rich mythology associated with it, with many peoples projecting their stories among these beautiful stars. Greatly abbreviated, one ancient Greek version has Zeus romancing Callisto. His wife Hera changed Callisto into a bear out of jealousy. Hera's son Arcus found Callisto (the bear) by chance in the forest and was about to kill her, so to save her, Zeus turned Arcus into a smaller bear (Ursa Minor), and threw the pair of them into the sky, causing their tails to be stretched. Both bears are circumpolar (visible throught the year) from latitudes north of about 10 degrees and Ursa Major is seen high above the pole star in the northern winter and below it (as in the photograph) in the summer. The two brightest stars in the constellation are Dubhe and Merak (a and ss Ursa Majoris), also known as the Pointers because a line drawn through them points to Polaris, the North Star. The main objects of amateur astronomical interest in Ursa Major are galaxies, five of which have Messier numbers / Bridgeman Images

FLO4592222: Electrical equipment, 18th century. Medical machine for electrifying the teeth, thunder house, torpedo, brush, and connecting frame of the Teylerian battery. Copperplate engraving by Wilson Lowry from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1820. / Bridgeman Images

PIX4592224: Lynx Constellation - Constellation of Lynx - Mirror of Urania by Jehoshaphat Aspin 1825 Recolorated by us Urania's Mirror, by Jehoshaphat Aspin, 1825. Recolored / Bridgeman Images

FLO4592253: Cutting engines, 18th century, including a rose engine lathe or figure lathe made by Holtzapffell & Deyerlien. Copperplate engraving by Wilson Lowry after a drawing by John Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1816. / Bridgeman Images

PIX4592270: Lyra Constellation - Constellation of Lyra - Lyra Constellation extracted from Hevelius Uranographia. Recolorised image. Map showing the constellation of Lyra with its mythological form from “” Uranographia”” star atlas by Hevelius (1690). Recolored Image / Bridgeman Images

FLO4592303: Engines for sharpening cutters by the ingenious mechanic and clockmaker Samuel Rehe (1735-1799) of London, 18th century. Copperplate engraving by Wilson Lowry after a drawing by John Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1818. / Bridgeman Images

PIX4592314: Constellations of the Fly and the Southern Cross - Constellations of Musca and the Southern cross - The Southern Cross and the Alpha and Beta Stars of Centaur. Below, the constellation of the Fly. In contrast to adjacent Crux, Musca (The Fly) is a much less obvious, less distinguished and less useful constellation that first appeared in Johann Bayer's 1603 Uranometria. It is one of a dozen created by the Dutch explorers/navigators Pieter Dirkszoon Keyser and Frederick de Houtman on their voyages into the south seas in the late 16th century / Bridgeman Images

FLO4592322: Plan and section of the great wheel of Jesse Ramsden (1735-1800)'s circular dividing engine, 1773. Copperplate engraving by Wilson Lowry from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1810. / Bridgeman Images

FLO4592325: Electrometers, 18th century. Copperplate engraving by Wilson Lowry from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1810. / Bridgeman Images

PIX4592344: Constellations of Ophiuchus and Snake - Ophiuchus and Serpens constellation / Bridgeman Images

FLO4592375: Bleaching equipment, 18th century, with bucking tub of lye and tank of oxy-muriatic acid (chlorine). Copperplate engraving by Wilson Lowry after a drawing by John Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1803. / Bridgeman Images

FLO4592376: Washing and clearing machines for bleaching, 18th century. Copperplate engraving by Wilson Lowry from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1804. / Bridgeman Images

FLO4592425: Face-turning lathe and riveting hammer, Block Machinery at Portsmouth naval harbour, 18th century. Copperplate engraving by Wilson Lowry after a drawing by John Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1812. / Bridgeman Images

PIX4592428: Orion and Sirius Constellation - Constellation of Orion and Sirius - Winter Sky. To the left is the star Sirius, to the right is the constellation Orion. Image obtained on 11 December 2006. To the left star Sirius and to the right the constellation of Orion, in a winter sky. Dec 11 2006 / Bridgeman Images

FLO4592439: Sawing machine at Portsmouth naval harbour, 18th century. Copperplate engraving by Wilson Lowry after a drawing by John Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1812. / Bridgeman Images

PIX4592732: Orion Constellation on Persepolis - Constellation of Orion, Persepolis, Iran - Orion Constellation seen above the ruins of Persepolis in Iran. Constellation of Orion above the ruins of Persepolis / Bridgeman Images

FLO4592869: Plan and elevation of a sugar mill, 19th century. Copperplate engraving by W. Lowry after an Illustration by J. Farey from Abraham Rees' “” Cyclopedia or Universal Dictionary,” London, 1816. / Bridgeman Images

FLO4592895: Surgical procedures from the 19th century: splints and bandages for a fracture of the leg. Copperplate engraving by Wilson Lowry from Abraham Rees' “” Cyclopedia or Universal Dictionary,” London, 1810. / Bridgeman Images

PIX4592900: Sky Star - Starry night - Pacific Coast, Chile, February 2008. Pacific coast, Chile, february 2008 / Bridgeman Images

PIX4592913: Sky Star - Starry night - Pacific Coast, Chile, February 2008. Pacific coast, Chile, february 2008 / Bridgeman Images

PIX4592919: Sky Star - Starry night - Pacific Coast, Chile, February 2008. Pacific coast, Chile, february 2008 / Bridgeman Images

FLO4592945: Surgical trusses from the 19th century: Dr. Hulme's palm truss, Mr. Salmon's patent, Mr. Whitford's, Mr. Marron's for exomphalos, and Mr. Eagle's. Copperplate engraving by Wilson Lowry after an Illustration by J. Farey Jr. from Abraham Rees' “” Cyclopedia or Universal Dictionary,” London, 1812. / Bridgeman Images

FLO4592952: Surgical equipment for the extraction of the cataract and for the Fistula Lachrymalis: minute steel tenaculum, Cline's instrument, scissors, anel's syringe and pipes, Wathen's tubes, lancet, Gibson's knife and tube. Copperplate engraving by Wilson Lowry after an illustration by J. Farey from Abraham Rees' “” Cyclopedia or Universal Dictionary,” London, 1812. / Bridgeman Images

FLO4593006: Surgical equipment for a lithotomy: sound, staffs, Blunt gorget, Hawkin's cutting gorget, Mr. Cline's cutting gorget, Mr. Aberney's gorget and forceps from the 19th century. Copperplate engraving by Wilson Lowry after an illustration by J. Farey from Abraham Rees' “” Cyclopedia or Universal Dictionary,” London, 1812. / Bridgeman Images