with a intermittent motion by connection with some of the proved a great success, and architects and steam heating en- Velocity of air 5 feet x 60 - 300 ■*■ into cubical contents, say, moving parts of the engine. gineers are likely to have very little more to do with it, as it 4,000=13-3 minutes.… … Mr. Charles A. Gale, of Piqua, Ohio, has plastered; but round, smooth metal linings To find the time for other sized flues, multiply the result patented an improved apparatus fortaking solar prints from with close joints give much the best results. The cross sec- by the cross section of flues in…
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