CONTENTS ix 



CHAPTER XXIII 



Motion-picture Photography 663 



By Carl Dreher. 



CHAPTER XXIV 



Aerial Photography 708 



By Leon T. Eliel. 



CHAPTER XXV 



Astronomic Photography 733 



By Harlan True Stetson. 



CHAPTER XXVI 



High-speed Photography 762 



By Harold E. Edgerton. 



CHAPTER XXVII 

 MiCROPHOTOGRAPHY AND TECHNICAL MiCROSCOPY 770 



By Francis F. Lucas. 



CHAPTER XXVIII 

 Geologic Photography 799 



By Robert F. Collins. 



CHAPTER XXIX 



Spectroscopic Photography 804 



By G. R. Harrison. 



CHAPTER XXX 



Radiography 822 



By Robert C. Woods. 



Appendix A. Tables of Conversion Factors 835 



Appendix B„ Relative Film-speed Designations 839 



Appendix C. Density-opacity-transmission Conversion 



Factors 840 



Appendix D. Filter Factors 846 



Appendix E. Weston Film -speed Ratings 850 



Author Index 855 



Subject Index 861 



