. Biology in America. Biology. Sebright Poultry Photoj^raplis of a normal scbrijjlit cock (ahovo), Avhich has the plumage of the hen, and castrated cock (below), which has male feathers. After Morgan, "Physical Basis of ; Courtesy of Professor Morgan and the J. B. Lipphuott Company. 326. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger

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