GENERAL MICROSCOPY 





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Fig. 6. A thin section of newsprint. 500 X 



of the fibers occurred and persisted through- 

 out the embedding process. This swelhng was 

 undesirable from the standpoint of the study 

 being made; but prior perfusion with a sol- 

 vent was necessary to promote impregnation 

 of the paper by the plastic; therefore, alcohol 

 was chosen as a suitable substitute. 



Deformed structure constitutes most of 

 the artifact found in thin sections, and 

 frequently it can be recognized by examining 

 and measuring the sample both in the em- 

 bedded and unembedded condition. 



In conclusion, it is apparent that the 

 successful application of microscopy depends 

 upon a great many factors which are con- 

 trolled by the interaction of the microscopist 

 with his instruments. It should again be 

 emphasized that the realization of significant 

 results depends upon the broad experience 

 and ingenuity of the worker, and in his 

 interest in applying various techniques, both 

 orthodox and unorthodox, the latter es- 

 pecially tailored to the problem. 



REFERENCES 



1. Shillaber, Charles Patten, "Photomicrog- 



raphy in Theory and Practice," John Wiley 

 & Sons, Ltd., London, 1944. 



2. Allen, RayM., "Photomicrography," Second 



Edition, D. Van Nostrand Company, Inc., 



Princeton, New Jersey, Toronto, New York, 

 London, 1958. 



3. Bennett, Alva H., Osterberg, Harold, 



JuPNiK, Helen, and Richards, Oscar W., 

 "Phase Microscopy," John Wiley and Sons, 

 Inc., New York, 1951. 



4. WiNCHELL, A. N., "Elements of Optical Min- 



eralogy, Part I. Principles and Methods," 

 5th Edition, John Wiley & Sons, Inc., New 

 York; Chapman & Hall, Ltd., London, 1951. 



5. Wahlstrom, E. E., "Optical Crystallog- 



raphy," 2nd Edition, John Wiley & Sons, 

 Inc., New York, 1951. 



6. Krajian, Aram, A., "Histological Technic," 



C. V. Mosby Company, St. Louis, Mo., 1940. 



7. Williams, R. C, and Wyckoff, R. W. G., 



"Applications of Metallic Shadow-Casting 

 to Microscopy," J. Applied Physics, 17, 23- 

 33 (January, 1946). 



8. Rossi, Bruno, "Optics," Addison-Wesley 



Publishing Company, Inc., 1957. 



9. Stoves, J. L., "Fibre Microscopy," National 



Trade Press, London, 1957. 



10. Chamot, Emile, and Mason, Clyde, "Hand- 



book of Chemical Microscopy," Vol. 1, Third 

 Edition, John Wiley and Sons, Inc., New 

 York, 1958, and Vol. 2, 2nd Edition, 1953. 



11. Feigl, Fritz, "Spot Tests, Volume I, Inor- 



ganic Application," Elsevier Publishing 

 Company, New York, 1954. 



12. Evans, B. S., Analyst, 69, 368 (1944). 



13. Gerds, a. E., and Melton, C. W., "New 



Etch Spots Leaded Steels," Iron Age, 178, 

 No. 9, 86 (August 30, 1956). 



380 



