At head of title: U.S. Department of Agriculture, Division of Chemistry

Investigations and analyses heretofore made. pp. 7

Sulphuring apples--objects. pp. 8

Process of evaporating fruits. pp. 10

Superiority of American evaporated fruits. pp. 11

Restrictions of trade in evaporated apples. pp. 12

Analyses undertaken by the Department. pp. 15

Action of the imperial governmnet. pp. 16

Collection of samples at New York factories -- Views of dealers in evaporated apples. pp. 20

Methods of analysis. pp. 23

Hefelmann's method of detecting zinc in evaporated apples -- Niederstadt's method of determining zinc. pp. 24

Legler's improved process -- Filsinger's method. pp. 25

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

Examination of the galvinized iron wire used in making the trays. pp. 32

Zinc as a natural content of apples. pp. 34

Substituion of other material for galvanized iron wire in the manufacture of trays. pp. 34

Summary. pp. 35

Index. pp. 37

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