Issue 17 and Volume 72.

QUESTIONS AND ANSWERS Conducted by I. HERBERT CASE “He that questioneth much shall learn much ”—BACON NOTE—Readers of FIRE AND WATER ENGINEERING are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified. Smooth and Ring Nozzles To the Editor: Please be kind enough to let me know the difference between a ring and a smooth nozzle. Thanking you in advance, Very respectfully, T. B. Answer: The only difference is the bore at the tip. The smooth nozzle, the type generally used, has an unobstructed even passage straight through. In the ring nozzle, now regarded as obsolete, a small square-shouldered ring, ordinarily 1/16-inch or 1/8-inch deep, is screwed into the tip, the purpose of this ring or shoulder, while slightly reducing the diameter, being to take the rough edge off the stream and prevent water from churning or curling…

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