Present sources of raw material 22 



Methods of manufs.cture 23 



Economics of manufacture 23 



Possibility of utilizing salmon cannery waste for fat, 



lipid, and cholesterol production 23 



Location in salmon cannery waste 23 



Percent comoosition 2^ 



Sorting problems 24 



Manufacturing difficulties 24 



Possibility of preparing special fat and lipid 



materials from salmon cannery waste 25 



Enzymes 2S 



Chemical nature 26 



Uses 26 



Present sources of raw material 2? 



Methods of manufacture 27 



Economics of manufacture 27 



Possibility of utilizing salmon cannery waste for en- 

 zyme production 28 



Location in salmon cannery waste 28 



Percent composition 23 



oorting problems 28 



Manufacturing difficulties 29 



Possibility of preparing enzymes from salmon can- 

 nery waste 29 



Hormones 30 



Insulin 30 



Possibility of utilizing salmon cannery waste as 



a source of insulin 30 



Other hormones 3I 



Miscellaneous organic compounds 31 



Literature cited 32 



Additional references y^ 



Bibliographies on chemical nature of fish and fish 



nutrition 3^ 



'^he preparation of vitamin oils from salmon cannery offal by the 



alkali digestion process 35 



Introduction 35 



Purpose of investigation 3^ 



Collection of raw material 36 



Equipnent used for alkali digestion 37 



Procedure for alkali digestion 37 



Suitability of alkali digestion for processing salmon offal 38 



Variations made in procedure for alkali digestion 39 



Processing salnon livers alone 3 9 



Digestion of total viscera 39 



Removal of both gonads 3 9 



Removal of testes frcm the waste 39 



Processing viscera lesr. gonads with salmon head oil 



added 



Miscellaneous other variables considered 



Discussion of results 41 



