CH XIV.] NON-COAGULABLE PROTEINS. 365 



Table D. 



Examination of Filtrate B for albumoses, peptones and gelatin. 



Table E. 



Examination of a solution for carbohydrates. 



If proteins be present they must be removed, as far as possible, 

 by neutralising, boiling and filtering. 



In any case the solution tested must be neutral. 



(a) To a small portion add diluted iodine drop by drop, until 

 an excess has been added. If a pure blue colour be obtained at any 

 stage of the addition of iodine, starch is present. If a purple or 

 brown colour be produced and the fluid be quite clear, erythro- 

 dextrin is present and glycogen absent. If a blue colour be 

 produced, or if the fluid be opalescent, proceed as follows : 



