Speaking of the Cobb-Douglas production function… In preparing the previous posting on Paul H. Douglas’ honors section of introductory economics at Amherst in 1925, I thought of searching for an internet copy of the Amherst College yearbook, The Olio, for that year and thanks to the Digital Collections folks at the Amherst College Archive, I was able not only to get a picture of Paul H. Douglas but even a portrait of his colleague Professor Charles W. Cobb. So here we have side-by-side Cobb and Douglas during their Amherst years together. This and the following image along with some biographical information (from the 1925 Olio, p. 29) are the only images of Cobb I was able to find on the internet (I admit, I did not look for more at the Olio collection for other years).
Image Source: Amherst College, Digital Collections. Olio 1926: Charles W. Cobb on p. 34; Paul H. Douglas on p. 36.