Xll LIST OF CONTRIBUTORS 



Haywood Parker, M. Sc, Service Department, Eastman Kodak Co., Rochester, 

 N. Y. Photographic Materials. 



John T. Rule, S. B., Division of Drawing, Massachusetts Institute of Technology, 

 Cambridge, Mass. Stereoscopic Photography. 



Harlan T. Stetson, M. Sc, Ph. D., cosmic terrestrial research, Massachusetts Institute 

 of Technology, Cambridge, Mass. Astronomical Photography. 



J. R. Weber, M. Sc, Ch. E., Du Pont Film Manufacturing Company, Parlin, N. J. 

 Developers and Theory of Development; Technique of Development. 



Deane R. White, Ph. D., Du Pont Film Manufacturing Company, Parlin, N. J. 

 Developers and Theory of Development; Technique of Development. 



A. T. Williams, Engineering Department, Weston Electrical Instrument Corp.. 

 Newark, N. J. Exposure and Exposvire Meters. 



Robert C. Woods, physicist, National Testing Laboratories, Inc., Rochester, N. Y. 

 Radiography, 



