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soda acid fire extinguisher

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An old water tank and shed, used to store a large soda-acid fire extinguisher at Lowell Observatory in Flagstaff, Arizona

An old water tank and shed, used to store a large soda-acid fire extin...

Established in 1894, Lowell is among the oldest astronomical observatories in the United States. In 2011, it was named one of "The World's 100 Most Important Places" by Time magazine. Title, date and keywords b... More