Above—The control system. On the left is the pipeline from the water main the 2 lower tap’s operate the opening of the ventilators and the 2 top taps, which connect with the overflow pipe shown at the right, control the closing of the ventilators. The centre pipeline at the top of the photograph leads to the overhead water pipe, which has taps at intervals, shown in the y illustration on the opposite page.
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https://paperspast.natlib.govt.nz/periodicals/NZJAG19491215.2.33.1
Bibliographic details
New Zealand Journal of Agriculture, Volume 79, Issue 6, 15 December 1949, Page 582
Word Count
73Above—The control system. On the left is the pipeline from the water main the 2 lower tap’s operate the opening of the ventilators and the 2 top taps, which connect with the overflow pipe shown at the right, control the closing of the ventilators. The centre pipeline at the top of the photograph leads to the overhead water pipe, which has taps at intervals, shown in the y illustration on the opposite page. New Zealand Journal of Agriculture, Volume 79, Issue 6, 15 December 1949, Page 582
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