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|Description=<translate><p><center><b>Longitude by dava sobel pdf</b></p>
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<p>VERY TRULY YOUR FRIEND, A. LINCOLN A presidential candidate writes a moving and revealing letter to a disappointed Harvard applicant The circumference of the Earth at the equator is, miles. The dramatic human story of an epic scientific quest and of one man's forty-year obsession to find a solution to the thorniest scientific dilemma of  Full of heroism and chicanery, brilliance and the absurd, it is also a fascinating brief history of astronomy, navigation, and clockmaking. In, the English Parliament passed the longitude act. Sailing on  Longitude is the dramatic human story of an epic scientific quest, and of John Harrison's forty-year obsession with building his perfect timekeeper, known today as the  4,  · by Dava Sobel. At one rotation per day that would be mph (obviously less near the poles). The dramatic human story of an epic scientific quest and of one man's forty-year obsession to find a solution to the thorniest scientific dilemma of the day--the longitude problem. Anyone alive in the eighteenth century would have known that the longitude problem was the thorniest scientific dilemma of the day-and had been In Longitude, Dava Sobel chronicles the world's quest to tame time. There are degrees in a circle &hrs in a day so /24=degrees per hr (or aboutdegree everyminutes world over). It established the Board of Longitude and offered a prize of, pounds to anyone who could find a simple and practical method for the precise determination of a ship's longitude Through Dava Sobel's consummate skill, LONGITUDE: HOW THE MYSTERY WAS CRACK'D A diverse band gathers at Harvard to honor John Harrison, the eighteenth-century inventor who single-handedly revolutionized the science of timekeeping. Dava Sobel. One degree of longitude equals four minutes of time the world over, but in terms of distance, one degree shrinks from sixty-eight miles at the Equator to virtually nothing at  Longitude by Dava Sobel () For the longest time, sailors who track their latitude (lines parallel to the equator), but not their longitude (long lines from pole to pole). The difference between the time of day at home port & local time would give Here lies the real, hard-core difference between latitude and longitude—beyond the superficial difference in line direction that any child can see: The zero-degree parallel of latitude is fixed by the laws of nature, while the zero-degree meridian of longitude shifts like the sands of time by Dava Sobel.</p></translate>
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