Fizeau–Foucault apparatus unit. At the time, Foucault was working at the Paris Observatory under Urbain le Verrier. It was le Verrier's belief, based on extensive celestial mechanics calculations, that the consensus value for the speed of light was perhaps 4% too high. Technical limitations prevented Foucault from separating mirrors R and M by more than about 20 meters. Despite this limited path length, Foucault was able to measure the displacement of the slit image (less than 1 mm) with considerable accuracy. In addition, unlike the case with Fizeau's experiment (which required gauging the rotation rate of an adjustable-speed toothed wheel), he could
SS City of Manchester (1851) built 1935, sunk 28 February 1942 by Japanese submarine I-153 off Java 6. "City of Manchester", built 1950, sold 1971 and renamed "Kavo Yerakes" 7. "City of Manchester", so named 1984-1985, before and after named "Hassel Werder". SS City of Manchester (1851) The SS "City of Manchester" was an iron-hulled single screw liner built 1851 by Tod & McGregor, Glasgow, Scotland and the second such ship owned by the Inman Line (officially the Liverpool and Philadelphia Steam Ship Company). It was an improved version of their first ship "City of Glasgow" which had been launched a year earlier. Steerage passengers