DURING an investigation of the pituitary regulation of wool growth, various ox anterior pituitary preparations were injected into normal sheep. The sheep were individually fed a constant weighed ration, and wool growth was measured by clipping an area of 20 cm. × 20 cm. defined by tattoo lines on the midside of the body at weekly or fortnightly intervals. The wool samples were extracted to remove ether-soluble and water-soluble grease, and the oven-dry weight taken as a measure of wool growth over the period between two successive clippings.
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Ferguson, K. A., and Boyden, S. V., J. Endocrinol., 9, 261 (1953).
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FERGUSON, K. Prolonged Stimulation of Wool Growth following Injections of Ox Growth Hormone. Nature 174, 411 (1954). https://doi.org/10.1038/174411a0
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