. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). Fig. 13.—Piece of tissue from frog embryo cultivated in lymph, two days old. The dark portion shows original bit of tissue. Lighter portions are new growth (From Harrison.). 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 Pearl, Raymond, 1879-1940. Philadelphia, London, J. B. Lippincott Company

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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherphila, bookyear1922