The Friction of Water in Elbows, by F. E. Giesecke, C. P. Reming, and J. W. Knudsom, Jr.
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INTRODUCTION: The investigation described in this bulletin was conducted under the auspices of the Bureau of Engineering Research of the University of Texas. The authors are indebted to Professor S. P. Finch, Department of Civil Engineering, and to Mr. H. R. Thomas, Bureau of Engineering Research, for many valuable suggestions during the progress of the investigation. A considerable portion of the laboratory work involved in the investigation was performed by Mr. L. D. Golden and Mr. D. C. Kinney, seniors in the Department of Mechanical Engineering, and by Mr. A. B. Awalt, a junior in the Department of Education. These men deserve much credit for the careful and accurate manner in which their work was performed. In order that the results of the proposed tests might not be affected by variations in the forms and sizes of the elbows which, no doubt, exist in groups of elbows pro~uced by different manufacturers, it was decided to secure the entire set of elbows from one manufacturer. When the plans for the investigation were submitted to Crane Company, Chicago, that corporation kindly donated the entire set of elbows used in this series of tests.