vi PREFACE 



been included in slightlj^ condensed form, on the design of formed thin-sheet aluminum- 

 alloy sections. Acknowledgment is also made here of data on properties of materials 

 contributed by the Alimiinum Company of America, United States Steel Corporation, 

 and the American Foundrymen's Association. 



Other engineers whose contributions to Product Engineering have been incorpo- 

 rated in this book are H. M. Brayton, 0. E. Brown, E. Cowan, C. Donaldson, R. G. N. 

 Evans, C. H. Leis, A. D. McKenzie, G. A. Schwartz, A. M. Wasbauer, B. B. Ramey, 

 J. W. Harper, H. M. Richardson, G. A. Ruehmling, T. H. Nelson, E. Touceda, W. S. 

 Rigby, R. S. Elberty, Jr., and G. Smiley. 



George F. Nordenholt, 

 Joseph Kerr, 

 John Sasso. 



New York, 

 April, 1942. 



