798 HANDBOOK OF PHOTOGRAPHY 



■ — • and Mary B. Stahk: A Study of Living Sperm Cells of Certain Grasshoppers by Means of the 



Ultra Violet Microscope, J. Morphol., 52 (No. 1), September (1931). 



: Advances in Microscopy, Proc. Intern. Congr. Testing Materials (Zurich, Switzerland), Sep- 

 tember (1931). 



: On the Design and Construction of a Precision High Power Metallographic Apparatus, Trans 



Am. Soc. Steel Treating, 21, December (1933). 

 KoHLER, A.: Some Innovations in the Field of Photomicrography with Ultraviolet Light, Natur- 



u'issenschaften, 21, 165-173 (1933). 

 Lucas, F. F.: Nodular Troostite, Metal Progress, February (1935). 



: Late Developments in Microscopy, J. Franklin Inst., 217, June (1935). 



: On the Preparation of Iron and Steel Specimens for Microscopic Investigations, Trans. Am. 



Soc. Metals, 24 (1936). 

 : On the Resolving Powers of the Infinity Objective of N.A. 1.40 and N.A. 1.60 used with a 



Precision High Power Metallographic Apparatus, Anniversary Vol. Sci. Repts. Tdkyd Imp. Univ., 



Series 1; dedicated to Dr. Honda (1936). 



: How Flaws Occur in Metals, Nat. Safety Neivs, February (1937). 



: Progress in Microscopy, Proc. Intern. Congr. Testing Materials (London) (1937). 



: Ultra Violet Microscopy of Hevea Rubber Latex, Ind. Eng. Chem., 30, February (1938). 



Stern, H. S.: Inexpensive Photomicrography, Am. Phot., 618. October (1934). 



Pratt, J. G.: Photomicrography of Opaque Objects, Am. Phot., 348, June (1936). 



Weiland, W. F.: Photomicrography as Applied to Metals, Camera, 1, January (1937). 



WiLMAN, C. W.: Notes on Low-power Stereoscopic Photomicrography, Phot. J., 491, August (1937). 



Warner, E. E.: Extension Tubes for Macro-photographs, Camera, 242, October (1937). 



McKat, H. C: Photomicrography for Everyone, Am. Phot., 786, November (1937). 



PiTTOCK, F. J.: Techniques in a Biological Laboratory, Phot. J., 218, April (1938). 



Dent, R. V.: Photographic Illustration of Medical Subjects, Phot. J., 197 (April 1938). 



Books: 



Hall, W. T., and R. S. Williams: " Chemical and Metallographic Examination of Iron, Steel and 



Brass," McGraw (1931). 

 Bentlet, W. a., and W. J. Humphries: "Snow Crystals," McGraw (1931). 

 Sattveur, a.: "The Metallography and Heat Treatment of Iron and Steel," McGraw (1935). 

 Williams, R. S., and V. O. Homerburg: "Principles of Metallography," McGraw (1939). 



