Lost at Sea: The Search for Longitude

One of the least likely books to storm the bestseller lists in 1996, Dava Sobel's absorbing, slim scientific thriller, Longitude, serves as the basis for this equally intriguing NOVA episode on the chief navigational problem for 18th century mariners: the inability to correctly determine longitude. Relying primarily on the less than optimum position-taking method known as "dead reckoning" (which left a lot of seafarers dead, I reckon), ships at sea required a more scientifically accurate measuring system to insure the safety of the cargo and crew. The problem was deemed so critically important that in 1714, British Parliament put forth a prize of 20,000 pounds to anyone who could solve the longitude problem. In fact, no less a personage than Sir Isaac Newton initially presided over the board that tested the theories and proposals of various "longitude lunatics." Although the scientific board felt certain that the answer to the problem lay in the hands of astronomers mapping the heavens--the celestial navigation route--the solution would come from a far different quarter: John Harrison, a rural, non-academic type who entered his mechanical sea clock in the contest. Harrison's quest (and battle with the scientific powers that be) would take nearly sixty years and makes for a fascinating tale of science, politics, and luck (good and bad). Combining dramatic (and often humorous re-enactments) with insightful interviews from scholars and authors (including Dava Sobel), Lost at Sea: The Search for Longitude is a lesson in great science and excellent storytelling. Highly recommended. Aud: H, C, P. (R. Pitman)