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1925. MONTHLY SUMMARY OF FOREIGN COMMERCE OF THE UNITED STATES. 
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(55) Wads worth. R. V. 
1920. note on the solubilities of theobromine. Analyst 45 : 133- 
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(56) 
1921. THE estimation of theobromine in cocoa and its products. 
Analyst 46 : 32-37. 
(57) 
1922. the theobromine content of cacao beans and cocoa. Analyst 
47: 152-161. 
(58) Whimper, II. 
1921. cocoa and chocolate: their chemistry and manufacture. 
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(59) Wilson, R. E. 
1924. countercurrent extraction. (U. S. Patent No. 1494090.) 
U. S. Patent Office. Off. Gaz. 322 : 450. illus. 
(60) Winton, A. L., Silverman. M., and Bailey, E. M. 
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(61) Zipperer, P. 
1902. THE MANUFACTURE OF CHOCOLATE AND OTHER CACAO PREPARA- 
TIONS. Ed. 2, 277 p., illus. Berlin, London, [etc.]. (Also 
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338, p., illus. Berlin 924.) 
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