The Narragansett Steamship Co's Steamer Providence of the Fall River Line, Capt. B. M. Simmons.
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Señales que indican la dirección de las diferentes especialidades del Hospital. Tirana. República de Albania.
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ARTE S. XXI. REPUBLICA DEMOCRATICA DEL CONGO. CHERI CHERIN (de nombre Joseph KINKONDA) (Kinshasa, 1955). Pintor congoleño. " ¿A DONDE VA EL MUNDO? " (2006). Acrílico y óleo sobre lienzo. Tate Modern.
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Pascal, Blaise (1623-1662). French mathematician,  physicist and philosopher. Measuring the air pressure. Colored engraving.
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Open air gauge.
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Experiment conducted in 1747 on the Thames by Martin Folcker, Cavendish and Bevis near London Bridge to measure the speed of electricity.
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Bourdon steel gauge.
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Experiment conducted in 1746 by Lemonnier in the monastry of Chartreux to measure the speed of electricity.
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Perier measuring the height of the tube of Torricelli on the top of the Puy de Dome.
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CASTILLA-LEON. LEON, capital. LOGOTIPO del CAMINO DE SANTIAGO, en la Calle Ruiz de Salazar. España.
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Reloj de sol.
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"DE METI ENDIS REBUS". Grabado de la MEDICION DE LA ALTITUD Y LONGITUD DE UN EDIFICIO. Parte III. Capítulo Primero. Edición en latín del año 1537. Biblioteca de la Universidad de Barcelona. Cataluña.
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Tacuinum Sanitatis. Medieval Health Handbook, dated before 1400, based on observations of medical order detailing the most important aspects of food, beverages and clothing.  Tailor. Miniature. Fol. 1
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RELOJ DE SOL.
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Sundial. Cathedral of Santa Maria Maggiore. Built in 1531. Ciudad Real. Castile-La Mancha. Spain.
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Surveyors sitting in a circle during a meeting. Miniature of the 14th century.
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Anaximenes (c. 610-547 BC). Greek philosopher of the Ionian school and one of the first to place the origin of the universe on a principle called infinite.
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METRONOMO construído por Winkel y patentado por Mälzel en 1816. S. XIX.
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BALANZA ANTIGUA.
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Sundial in a facade. Barcelona. Catalonia. Spain.
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Tramo de la histórica RUTA 66. Godley. Estado de Illinois. Estados Unidos.
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Euclid (first half 3rd century BC). Greek mathematician, founder of the School of Alexandria.
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INDICADORES frente a la ABADIA DE WESTMINSTER. LONDRES. Inglaterra. Reino Unido.
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CARTEL de la RUTA 66. GODLEY. Estado de Illinois. Estados Unidos.
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Astrolabe of 1566. Netherlands.
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