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A protractor on a white background.
old sextant, spyglass, circle and compass lying on wooden table
old equipment and science experiments in laboratory.
Antique telescope on a tripod at a beach facing window.
Camera Dials and Controls on an antique 35mm rangefinder type camera.
Concave mirror scientific experiment
Close-Up Of Protractor Over White Background
Close up detail of a log/log slide rule isolated on a black background.
3D Rendering Illustration of a  Microscope designed and use by Robert Hooke in the middle of XVII century; with wooden bases and parts, mobile metal components, removable lenses, crystals & oil lamp.
Close-up of letter scale with blue ribbon on white background.
Goniometer movement medical instrument used for measuring mobility of joints, tendons nd ligaments of patients.
Mechanical processing fixture
Vintage sextant isolated on white background. Antique marine navigation instrument. Orientation by the stars.
A sextant is a marine navigation instrument on white background which is used to measure the angle between two objects.
Old brass telescope on white background.
Yellow transparent protractor on a white background
A brass ship telegraph indicating instructions to the engine room close up, isolated on white
Antique bronze sextant on old paper background
Detail of a geometry set in its tin
vintage pocket microscope isolated on white background
Old telescope
Ancient Navigation Measuring Instrument Tool isolate on white background with clipping path
Vintage photograph of Camille Flammarion, French astronomer, looking through telescope at Observatory at Juvisy-sur-Orge, 1890s
old nautical sextant with optics isolated on white background
Electronic Instrument on White Background
Physical therapy mecical clinic physiotherapy goniometer to measure range of movement in patient in rehabilitation.
Optical tool with mirrors and magnifying glasses
marine sextant isolated on white background
Old black scales
Free Images: "bestof:Leeson goniometer.jpg goniometer invented by Henry Beaumont Leeson; reproduced in John Quekett A Practical Treatise on the use of the Microscope 1852 http //www"
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Prins_Maurits_vergezeld_door_zijn_twee_broeders,_Frederik_V,_keurvorst_van_de_Palts_en_enkele_graven_van_Nassau_te_paard_Rijksmuseum_SK-A-445.jpeg
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John Leeson (cropped).jpg
Henry_Gawler_(1766-1852)_and_his_brother_John_Bellenden_Ker_(1765-1842)_holding_a_portfolio,_as_children_with_their_dog_by_Henry_Bone.jpg
A MORAL treatise, in Latin, by John Skelton, poet laureate, dedicated to Prince Henry, aterwards Henry VIII., and dated Eltham, 28 Aug. 150 1. Imperfect. Small Octavo.- - Lower cover (Add Ms 26787).jpg
A MORAL treatise, in Latin, by John Skelton, poet laureate, dedicated to Prince Henry, aterwards Henry VIII., and dated Eltham, 28 Aug. 150 1. Imperfect. Small Octavo.- - Upper cover (Add Ms 26787).jpg
A treatise containing the description and use of a new and curious quadrant, made and finished by ... John Rowley - Upper cover (59h11).jpg
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