ID#: 8522
Caption:
This historic 1932 photograph depicted a weir type measurement system that had been implemented, in order to measure and monitor levels of creamery waste that was being dumped into a stream near Farmington, Minnesota. The weir method is a way of determining the volume of a fluid, by measuring its flow rate in gallons/minute. This was one of a series of instructional images used by the Minnesota Board of Health to train its public health workers. The purpose of the images, and the training was focused on protecting water supplies from bacterial contamination, due to incorrect disposal of waste, including that produced by dairying processes, which might foul ground water, nearby rivers, lakes, and streams. The description also stated that the image was labeled as File plate no. 211.
High Resolution: Click here for hi-resolution image (15.6 MB)
Content Provider(s): CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
Creation Date: 1932
Photo Credit:
Links: Minnesota Health Department
Minnesota Health Department; R.N. Barr Library
Categories:
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Copyright Restrictions: Permission is not required for public domain images, however, these images are provided by CDC and are available for personal, professional, and educational use with appropriate attribution. Redistribution must credit CDC and, where known, the individual photographer, and identify the CDC website as the free source. For additional terms see Use of Agency Materials | Other | CDC