Word: nitrogenating
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...first flight, he has been working closely with the MMU's designers to perfect the complex machine, which looks like a seatless chair and can be steered by controls in its armrests. Each of these controls activates one or more of 24 jets that expel puffs of nitrogen gas. When McCandless fired jets on one side of the MMU, they provided a textbook example of Newton's third law ("For every action, there is an equal and opposite reaction"): the astronaut was propelled the other...
...million device resembles nothing so much as a clumsy overstuffed armchair without a seat. On earth it weighs 340 lbs., but in zero-g an MMU can fly like a bird. A squirt or two of nitrogen gas from any of its 24 small jet thrusters can propel it in any direction. Strapped into this flying chair, an astronaut need only work the handle-like controls built into the armrests...
...acquisitions today-a helium-neon laser, a flow meter, some bookends, a Rolodex, a light table, a 3-ft.-tall thermos for liquid nitrogen, a massive pneumatically operated vacuum valve-will go into storage with the rest, waiting for a buyer. "I've got $20 million-that's Government cost, not mine-worth of stuff," says Grothus. "I'm looking for someone to sell it to for 10? on the dollar. I'm trying to sell it to the People's Republic of China. It's usable. It would fill the technical and scientific...
Five caryatids of the Erechtheum, which support carvings that acid rains have obliterated, were replaced temporarily with plaster likenesses. The original caryatids have been taken to the Acropolis Museum, where they will be placed in a glass chamber filled with nitrogen, a gas that acts as a preservative...
...crossings are made in sailboats only marginally longer than their pilots. There are specialists in climbing frozen waterfalls and skiing slopes too steep to stand on, and in exploring underwater, with scuba gear, caves so deep that helium must be mixed with the oxygen that is breathed, to forestall nitrogen narcosis. A couple of canoeists have just lined their craft up the Grand Canyon and portaged the Rockies. An unemployed actress named Julie Ridge swam twice around Manhattan Island this summer (about 28 miles); although the publicity did not bring her a job, she said she felt better about herself...