The selection of prolactin as the subject of the Midwest Con­ ference on Endocrinology was not only dictated by the recent ad­ vances in prolactin research but also by the long tradition in that particular area of Endocrinology in the laboratory of C.W. Turner at the University of Missouri. Therefore, it seems only appropri­ ate that these proceedings of the Tenth Midwest Conference on En­ docrinology are dedicated to the memory of this scientist, deceased in August 1975 before completion of this volume, whose pioneer in­ vestigations have contributed substantially to the advancement of our knowledge in many areas of Endocrinology and who played a major role in the early phases of prolactin research. This volume contains a review of the early studies in Turner's laboratory and the latest results obtained by some of the leading research workers in this area and should be a fitting memory to C.W. Turner. Some of the manuscripts printed here were prepared after the conference was held and include material of more recent origin. Much of the delay in publication was due to the length of time de­ voted to preparation of these manuscripts. To the other authors and participants, and to Plenum Press, we express our appreciation for their patience and cooperation. We also with to thank Mrs.

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Historical Perspectives of Lactogenic Hormone (Prolactin): A Summary of My Research at the University of Missouri.- Discussion Barnawell, Turner.- The Chemistry of Prolactin.- Discussion Lewis, Mills, Parsons, Frantz, Jacobs, Meites, Sage.- Secretion and Crinophagy in Prolactin Cells.- Discussion Winnacker, Farquhar, Jacobs, Barnawell, Meites, Dellmann, Parsons.- The Assay and Regulation of Prolactin in Humans.- Discussion Barnawell, Frantz, Jacobs, Meites, Gillespie, Parsons.- Evaluation of Research on Control of Prolactin Secretion.- Discussion Winnacker, Meites, Jacobs, Derby.- Prolactin, The Liporegulatory Hormone.- Discussion Fleming, Meier, McDowell, Sage.- The Role of Prolactin in Mammogenesis and Lactogenesis.- Discussion Barnawell, Jacobs, Klein, Sage.- Additional Presentations.- Inhibition of the Renal Response to Intravenous Prolactin by ADH.- The Effect of Adrenalectomy on the Renal Response to Intravenous Prolactin.- Addendum: Antidiuretic Hormone in Ovine Prolactin (NIH SP10).- The Effect of Ergocornine on Water and Sodium Metabolism in Female Rats.- Discussion Mills, Bond, Jacobs, Parsons, Pasley, Fleming, Koike.