AGRICULTURAL 



LIBRARY, 



UNIVERSITY 



OF^- 



CALIFORNIA. 



LETTER OF SUBMITTAL. 



SIR : I have the honor to submit herewith Part Fifth of Bulletin 

 No. 13, containing the results of an investigation into the character 

 and composition of baking powders, in continuation of the work on 

 food adulteration. My absence in connection with the sugar experi- 

 ments has greatly delayed the completion of the work and the prepara- 

 tion of this report. 



My thanks are due to Mr. K. P. McElroy and Mr. T. C. Trescot for 

 the intelligent assistance rendered by them in the performance of the 

 analytical work. 



Kespectfully, 



C. A. CRAMPTON, 



Assistant Chemist. 

 Dr. H. W. WILEY, 



Chief Chemist. 



559 



