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Professor Johnson and three students investigating water hydrant fixtures, 1957
Professor Howard Johnson helps one student adjust a water hydrant fixture, while two others observe in a lab class about sprinkler irrigation equipment.
Professor Johnson discussing sprinkler irrigation equipment with students, 1957
Professor Howard Johnson (in tie) discusses the design and operations of sprinkler irrigation equipment with agricultural engineering students in lab class.
Professor Johnson and three students investigating water hydrant fixtures, 1957
Professor Howard Johnson helps one student adjust a water hydrant fixture, while two others observe in a lab class about sprinkler irrigation equipment.
Professor Johnson discussing sprinkler irrigation equipment with students, 1957
Professor Howard Johnson (in tie) discusses the design and operations of sprinkler irrigation equipment with agricultural engineering students in lab class.
