FIBERS (TEXTILE) 



based upon the experience and qualifications 

 of the individual expressing it. Only through 



Fig. 6. Comparison photomicrographs of 

 breech block markings on two cartridge cases fired 

 in the same weapon. 



Fig. 7. Comparison photomicrograph of ejec- 

 tor marks on two cartridge cases fired in the same 

 weapon. 



a proper background and intimate famili- 

 arity with procedures and literature in the 

 field can this information or opinion be ac- 

 cepted as well-founded in court. 



REFERENCES 



Journal of Criminal Law, Criminology and Police 

 Science," Northwestern School of Law (Chi- 

 cago), Williams & Wilkins Company, Balti- 

 more, Md. 



Journal of Forensic Sciences, American Academy 

 of Forensic Sciences, Callaghan & Company, 

 Chicago. 



Analytical Chemistry , American Chemical Society, 

 Washington, D. C. 



The Microchemical Journal, Interscience Pub- 

 lishers, Inc., New York. 



Mikrochimica Acta, Springer-Verlag, Vienna. 



Kriminalistik, Hamburg, West Germany 



Hatcher, J. S., Jury, F. J., and Weller, J. 

 "Firearms Investigation, Identification and 

 Evidence," Stackpole Company, Harrisburg, 

 Pa. 



Davis, John E., "An Introduction to Tool Marks, 

 Firearms and the Striagraph," C. C Thomas, 

 Springfield, 111. 



O'Hara, C. E., and Osterburg, J. W., "An In- 

 troduction to Criminalistics," Macmillan 

 Company, New York. 



Kirk, Paul L. "Crime Investigation," Inter- 

 science Publishers, Inc., New York 



Gonzales, T. A., Vance, M., Helpern, M., and 

 Umberger, C. J., "Legal Medicine, Pa- 

 thology and To.xicology," Appleton-Century- 

 Crofts, Inc., New York. 



Joseph D. Nicol 



General microscopy 



FIBERS (TEXTILE) 



Microscopic methods are used in fiber 

 technology for: (1) Fiber identification, (2) 

 detection of damage, (3) structural investiga- 

 tion, (4) fiber measurement. 



On the whole, normal light microscopic 

 methods are in most general use; electron 



optical methods are important only for fine 

 structural examination. With the bright-field 

 microscope, fibers are examined longitud- 

 inally or in cross section usually after stain- 

 ing. 



The projection microscope is much used for 

 fiber research. The special instruments used 

 for this purpose are known as lanameters or 



343 



