Snellen chart. A wall chart developed by a Dutch ophthalmologist Hermann Snellen in the 19th century, which is still used today to measure visual acuity. It consists of 11 lines of block letters of decreasing size, which are to be read at a distance of 6 metres (20 feet).
See bridge in maps. Pont de Normandie is a cable-stayed road bridge that crosses the river Seine and contect Le Havre to Honfleur in Normandy, in France. The bridge was designed by Michel Virlogeux. Construction began in 1988 and the bridge was opened in January 1995.
â¦such as the late 1st-century-bce Pont du Gard, a many-arched bridge and aqueduct spanning 22 metres (72 feet) near NÃ®mes, in France, or the fine bridge over the Tagus River at AlcÃ¡ntara in Spain, with a span of almost 30 metres (100 feet), built about 110 ce. Oddly enough, suchâ¦