Measurement: a scholar making observations of a pendulum, with two servants, one writing at a table. Engraving by J. Basire… https://www.rawpixel.com/image/13998824/image-cartoon-person-booksFree Image from public domain licenseAstronomy: a large refracting telescope, in a specially constructed observatory. Wood engraving, 1881. https://www.rawpixel.com/image/14004448/image-person-airplane-skyFree Image from public domain licenseFive people looking through various types of spectacles.. Colour lithograph by F.S. Delpech after L.L. Boilly. https://www.rawpixel.com/image/13982875/image-cartoon-face-personFree Image from public domain licenseAstronomy: an astronomer in his study, looking out of the window with a telescope. Engraving by C. Grignion after S. Wale. https://www.rawpixel.com/image/13987406/image-stars-person-booksFree Image from public domain licenseAn old man wearing spectacles and his four pupils experiment using optical instruments and materials. Line engraving by F.… https://www.rawpixel.com/image/14014370/image-cartoon-person-artFree Image from public domain licenseJean Sylvain Bailly, Mayor of Paris, with his mistress, both represented as chickens. Etching, 1791. https://www.rawpixel.com/image/13984686/image-paper-cartoon-faceFree Image from public domain licenseLondon, seen from beside Flamsteed House in Greenwich park. Lithograph by T. S. Boys after himself, 1842. https://www.rawpixel.com/image/14003538/image-frame-plant-personFree Image from public domain licenseKing George I representing royalty, a bishop representing episcopacy; and a judge representing law, all as seen through a… https://www.rawpixel.com/image/13985904/image-cartoon-person-moonFree Image from public domain licenseEpidaure, restauration & description des principaux monuments du sanctuaire d'Asclépios / relevés et restaurations par… https://www.rawpixel.com/image/14010677/image-pattern-circle-public-domainFree Image from public domain licenseOptics: a telescopic microscope, and hand-lenses. Aquatint, 1787 [by R. Laurie after Milne ]. https://www.rawpixel.com/image/14019709/image-paper-hand-public-domainFree Image from public domain licenseAstronomy: a large refracting telescope, and projection of the transit of Venus. Wood engraving. https://www.rawpixel.com/image/14021664/image-cartoon-person-artFree Image from public domain licenseThe workshop of the spectacle maker and examples of his craft. Line engraving by ÆB. https://www.rawpixel.com/image/14002223/image-cartoon-person-airplaneFree Image from public domain licenseThree men looking through telescopes at young women bathing in the sea. Wood engraving. https://www.rawpixel.com/image/14003617/image-dog-horse-cartoonFree Image from public domain licenseGreenwich, with people in the foreground, London in the distance. Photo-lithograph by Dawsons after H. Dawson. https://www.rawpixel.com/image/14013738/image-dog-cloud-horseFree Image from public domain licenseSpotprent op de Hollanders (nr. 2), 1795 / 1814 (1814) by anonymous, Vallardi and anonymous https://www.rawpixel.com/image/13783417/image-paper-cartoon-faceFree Image from public domain licenseA barber's shop in which men demonstrate the sense of sight. Etching by W. Peeters after C. de Wael. https://www.rawpixel.com/image/13993290/image-dog-cartoon-personFree Image from public domain licenseAn optical experiment using a giant lens to reflect sun-rays to create fire, with optical instruments scattered and… https://www.rawpixel.com/image/13998202/image-cartoon-person-artFree Image from public domain licenseAntenna architecture tower broadcasting. AI generated Image by rawpixel. https://www.rawpixel.com/image/12371114/image-cloud-paper-watercolorView licenseAstronomy: an observatory telescope, with an astronomer recording the transit of Venus. Engraving by James Basire. https://www.rawpixel.com/image/13991658/image-cartoon-people-artFree Image from public domain licenseA man is looking out of the window through a telescope as young children play on a rocking horse. Etching. https://www.rawpixel.com/image/13986765/image-dog-angel-horseFree Image from public domain licenseGalileo Galilei. Line engraving by P. Bettelini after T. Minardi after D. Cresti, il Passignano, 1624. https://www.rawpixel.com/image/14015516/image-face-person-artFree Image from public domain licenseAstronomy: telescopic and photographic equipment, with a device for projecting the shadow of the moon. Wood engraving, 1875. https://www.rawpixel.com/image/13983076/image-cartoon-shadow-personFree Image from public domain licenseVintage European style binoculars illustration from Cook's Handbook for London. With two maps by Thomas Cook (1879).… https://www.rawpixel.com/image/556308/vintage-binoculars-illustrationFree Image from public domain licenseColorful fish illustration set png https://www.rawpixel.com/image/2621167/free-illustration-png-dolphin-fish-blue-vintage-rocksView licenseMan silhouette looking through a telescope from Mr.Grant Allen's New Story Michael's Crag With Marginal Illustrations in… https://www.rawpixel.com/image/573372/man-using-telescope-silhouetteFree Image from public domain licensePNG Drawing of a binoculars, transparent background https://www.rawpixel.com/image/572278/png-drawing-binoculars-transparent-backgroundView licensePNG Drawing of vintage binoculars, transparent background https://www.rawpixel.com/image/561224/png-drawing-vintage-binoculars-transparent-backgroundView licensePNG victorian vintage icon hand drawn illustration set https://www.rawpixel.com/image/2784610/free-illustration-png-ancient-antique-artView licenseVector fish vintage colorful collection https://www.rawpixel.com/image/2707777/premium-illustration-vector-mackerel-chinese-vintage-sea-lifeView licenseTelescope icon from L'ornement Polychrome (1888) by Albert Racinet (1825–1893). Digitally enhanced from our own… https://www.rawpixel.com/image/328860/premium-illustration-psd-lornement-polychrome-telescope-oldView licenseHand drawn colorful fish collection https://www.rawpixel.com/image/2737091/premium-illustration-image-vintage-exotic-animals-antique-marine-fishingView licenseColorful bird clipart collection psd https://www.rawpixel.com/image/2621177/premium-illustration-psd-tropical-underwater-animals-tropical-fish-animalView licensePay-Per-View Content Magnifier Observation Concept https://www.rawpixel.com/image/958002/free-image-rawpixelcomView licenseGalaxy Astronomy Exploration Nebular Concept https://www.rawpixel.com/image/904548/free-image-rawpixelcomView licenseClassic icon psd vintage illustration set https://www.rawpixel.com/image/2784472/free-illustration-psd-ancient-antique-artView licenseGalaxy Astronomy Exploration Nebular Concept https://www.rawpixel.com/image/904714/free-image-rawpixelcomView license