In October 1943, the oceanographer Arthur Doodson, head of the Liverpool Tidal Institute, got a letter from his friend Commander Ian Farquharson. For months, Doodson and the machine he’d perfected had ...

How do you land 140,000 allied troops on an 5-mile long stretch of beach under heavy German bombardment? Very carefully. And to ensure the deployment of forces without stranding landing craft—while ...

The Second World War was not won or lost due to a single battle, nor did one new weapon or secret tool sway the outcome. There were countless innovations that played a role, and while some—such as ...

THE simplicity of the harmonic methods of analysis and prediction of tides is very fascinating, and the invention of the tide-predicting machine by Lord Kelvin almost ensured the success of the ...

UNDER the above title in NATURE of February 23, Dr. A. T. Doodson comments on my letter that appeared in the issue of NATURE for February 2 under the same title. Unfortunately, Dr. Doodson is dealing ...