It. S. Department of Agriculture,

Division of Chemistry, Washington, D. C., March 1, 1892.

Sir: I beg to transmit herewith for your inspection and approval the manuscript of Part Seventh of Bulletin No 13, relating to the adulteration of coffee, tea, and chocolate. Respectfully,

H. W. Wiley,

Chemist. Hon. J. M. Rusk,

Secretary of Agriculture.

Letter Of Submittal

U. S. Department of agriculture,

Division of Chemistry, Washington, D. C, February 29, 1892.

Sir: I herewith submit to you the report which has been prepared by Mr. E. E. Ewell and myself upon investigations of tea, coffee, and cocoa preparations. That part of the report and bibliographic work upon cocoa preparations is entirely due to Mr. Ewell, who has also assisted in the general analytical work. I also acknowledge the assistance of Messrs. McElroy, Trescot, Krug, and Sanborn.

This report has been unavoidably and materially delayed in its preparation, but this time has not been lost, since much of the foreign and other work on artificial coffees has been accomplished since it was begun.

Respectfully,

G. L. Spencer,

Assistant Chemist. Dr. H. W. Wiley,

Chief Chemist.

VII

U. S. Department Of Agriculture Division Of Chemistry - Bulletin No. 13.

Foods And Food Adulterants

Investigations Made Under Direction Of H. W. Wiley, Chief Chemist.

Part Seventh