Diagram: line y=π between x=-∞and x=-1, considered as a line bent back on itself, forms the stream-line ψ=π; viz. as Φ decreases from +∞ through, 1961

Diagram: line y=π between x=-∞and x=-1, considered as a line bent back on itself, forms the stream-line ψ=π; viz. as Φ decreases from +∞ through, 1961, Box: 9; Item: 6202; Folder: 16.3. Negatives and Photographs of Fritz Engineering Laboratory Tests and Events, SC Photo 0013. Lehigh University Grant Projects. https://archivesspace.lib.lehigh.edu//repositories/7/archival_objects/77323 Accessed April 17, 2026.