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INVESTIGAT TONS MADE v SDER 1 DIREC TION OF 
FE. Ww. WILEY, 
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PART SEVENTH. 
3 COFFEE, AND ) Cocoa PREPARATIONS. 
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GUILFORD L. SPENOER, Assistant Chemist, bs 
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WITH THE COLLABORATIPN OF MR. ERVIN, E. EWELL. 
