- 119 - 



609« Roberts, E. J., C. A. Fort and L. F. Martin. Fate of some non-volatile 



organic acids of sugar cane juice in ferraentation. Sugar J. 16, No. 6, 

 36-7 (1953). Abstr. - C. A. J48, 9011. 



610. .Roberts, E. J., C. A. Fort and L. F, Martin# Identification and determi- 



nation of non-nitrogenous organic acids of sugar cane by partition 

 chromatography, Abstr. Papers Am. Chem. Soc. 12l\. , 10 D (1953). 



611. Roberts, E. J. and L. F. Martin. Identification and determination of non- 



nitrogenous organic acids of sugar cane by partition chromatography. 

 Anal, Chem._2£ 815-8 (195W- Abstr. - C. A. 1+8, 1109^. J. Sci. Food 

 Agr. Abstr. 5* iij 176. 



612. Robertson, A., G. Soliman and E. C. Owen* Polyterpenoid compounds. I. 



Betulic acid from Cornus florida L* J. Chem. Soc. 1939* 1267-73. 

 Abstro - C. A. %, 93. 



613. Rochleder, F. and A. Kawalier. The Ericaceae family - Investigation of 



leaves of Arctostaphylos uva ursi. Sitzungsberichte der Eaiserliche 

 Akademie zu Wien - Math, -naturw. Classe, Abt Is 9j 286-312 (1852). 



61I4.. Rothert, W, and W, Boratynska. The occurrence of calcium oxalate cyrstals 

 in the tissues of evergreens. Poznan. Towarz. Przyjaciol Nauk, Wydzial 

 Mat. Przyrod. Prace Komisji Biol. 13, Wo. 10, i+3 pp. (1953). Abstr. - 

 C. A. U]_ 9 881+5. 



6l5a Rowe, E. J., J. E. Orr, A. H. TJhl and L. M. Parks. Oleanolic and ursolic 

 acids from Thymus vulgaris L. J. Am. Pharm. Assoc. 38, 122-lj (191+9). 

 Abstr. - Brit. Abstr. 1951* AIII, 108, C. Ac Uh, 581. 



616. Rudkin, 0. 0. and J. M. Nolson. Chlorogenic acid and respiration of sweet 



potatoes. J. Am. Chem. Soc. 60, 11+70-5 ( 191+7). Abstr. - Brit. Abstr. 

 191+8 , AIII, 985. 



617. Ruhland, W. and K. Wetzelo Physiology of organic acids in green plants. 



I. Correlation between nitrogen and change in acidity in Begonia 

 somperflorens. Planta 1, 558-61+ (1925). Abstr. - c/a. 22, 3192. 

 Chem. Zentr. 1926, ii, 2067. 



618. Ruhland, W, and K. Wetzel. The physiology of organic acids in green plants. 



III. Rheum hybridum. Planta 3; 765-9 (1927). Abstr. - C. A. 23, 391+9. 

 Brit. Abstr. 1929 , Al[77, Expt. Sta. Record 59, l+26 



619. Ruhland, W. and K. Wetzel. The physiology of organic acids in green plants. 



V. Rheum hybridum Hor t. Planta 7, 503-7 (1929 )• Abstr. - Chom. Zentr. 

 1931, I, 2630. 



620. Ruzicka, L. and V. Prelog. Polyterpenes and polyberpenoids. CXXII. The 



double bond of quinovic acid. Helv. Chim. Acta 20, 1570-5 (1937). 

 Abstr. - C. A„ 32, 291+7. 



621. Ryder, A. E The oxalic acid content of vegetables used as greens. J. 



Home Econ. 22, 309-11+ (1930). Abstr. - C. A. 2li, 2511. 



