Word: vessels
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...that was not the day. The firing had started when British watchers discovered a convoy of German ships trying to ghost northward through the English Channel, hugging the coast at Cape Gris-Nez. Two hundred shells were fired. One large enemy merchant vessel was sunk, another was hard hit. From this German willingness to risk ships in the Channel shooting gallery, Allied commanders judged that the steady air pounding of French railroads and communications must be snarling normal overland supply lines behind the Invasion Coast...
...hitherto unattainable on an industrial scale. To do this, they had to maintain a high vacuum of less than 1 mm. air pressure inside the huge tanks and pipes where materials were to be treated. Mechanical pumps (which work not by sucking but by sweeping air out of a vessel) are not very effective at pressures below...
Morse's group solved this problem by making large, high-powered versions of a diffusion pump invented by General Electric's Physicist Irving Langmuir. The diffusion pump works by blowing a strong jet of mercury or oil vapor into the neck of the vessel to be emptied. The vapor stream traps air molecules and sweeps them out through a series of locks. With this equipment, Morse got down to a working vacuum of one micron (a thousandth of a millimeter...
...soldier's son saw service on a British cruiser, served on an escort vessel in North Atlantic convoy early in World War I, stayed on while the Canadian Navy went back to a peacetime starvation basis...
...mushrooming U.S. merchant marine (50 million tons in 1944) is about to add a new and useful type of vessel-a small (4,000 ton), fast (12 knot), and economical (diesel-powered) freighter...