Leadership

Questions and Answers

Issue 12 and Volume 88.

Questions and Answers NOTE—Readers are invited to send in questions, which will be answered in the order received. Names are omitted from questions unless otherwise specified Lifting Water by Suction To the Editor: There is quite a controversy in our department at present regarding the height to which a pumper will draught water at the elevation of our city. The barometer at the place of the pumping stands at exactly 29 inches, and the elevation is 1,300 feet above sea level. The pumping is to be done in theory by a 1,000 gallon piston pump, in excellent condition. My calculations are as follows: Mercury is 13.58 times heavier than water, and therefore a column of mercury 29 inches high should be equal to a column of water 29 x 13.58 or 32.8 feet. As no pump is mechanically perfect, I allowed an 85 per cent efficiency, and this would result…

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