Beginning of Essay
: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is written by Dava Sobel. The book is called because it is about a clock maker who was able to determine . Determining was the superlative scientific question in the eigh ....

Middle of Essay
.... After many observations, Halley concluded that the moon’s rate of revolution around the earth was accelerating overtime. John Harrison was a simple clockmaker and a self-educated person who was accredited for finding by means of a timekeeper. John built his first pendulum watch in 1713. It was constructed entirely out of wood. Harrison called his first sea clock Harrison’s No. 1 or H-1 for short. H-1 was bar-shaped, built out of shinny brass, and was big in size. His second attempt was called H-2. H-2 was a heavy weight of 86 pounds, but fitted into a small box as John promised it would. H-2 was also bar-shaped and included a ....