CONTENTS. 



Page. 



Investigations and analyses heretofore made 7 



Sulphuring apples — objects 8 



Process of evaporating fruits 10 



Superiority of American evaporated fruits 11 



Restrictions of trade in evaporated apples 12 



Dried apples at Hamburg 12 



Dried apples at Cologne 14 



Analyses undertaken by the Department 15 



Restrictions against American dried apples in Germany 15 



Action of the imperial government 16 



Collection of samples at Xe w York factories _ 20 



Views of dealers in evaporated apples 20 



Methods of analysis 23 



Hefelmanu's method of detecting zinc in evaporated apples 24 



Niederstadt's method of determining zinc 24 



Legler's improved process '. 25 



Filsinger's method 25 



Methods of analyses employed in the laboratory of the Division of Chemistry. 25 



Analytical work 26 



Description of evaporated apples analyzed 26 



Discussion of data obtained 28 



Examination of the galvanized iron wire used in making the trays 32 



Physiological action of zinc 33 



Zinc as a natural content of apples 34 



Substitution of other material for galvanized iron wire in the manufacture of 



trays 34 



Summary 35 



5 



I 



