COMTEOTS 



Page 



Tjrpes of X-ray machines 1 



X-ray films . . , 2 



Cassettes 3 



Developing and fi:>cing solutions 3 



X-ray procedure 1; 



Cost analysis 7 



AcknoTvledgments 7 



Literature cited 7 



Appendix , 9 



FIGURES 

 No. 



X-ray photograph of an Atlantic menhaden, 



90 millimeters fork length Frontpiece 



1. Diagnostic X-ray machine used in menhaden radiography ... 2 



2. X-ray photographs of larval fish using Kodalith film ... 3 



3. Relation of e>rposure time to fish size using Kodalith 



film at 65 lev 3 



h. Relation of kilovoltage to fish size for standard X-ray 



film h 



S» X-ray photograph showing exaraj:;les of under, optimum, 



and over-exposure i $ 



6. Lightbox for viewing X-ray films of menhaden vertebrae . . 6 



7. Schematic diagram, of X-ray emitter circuit 9 



