MISSOURI BOTANICAL GARDEN BULLETIN 11 
other journals are included by title in the list given below. No 
small part of the investigations completed remain unpublished, 
and it may be noted in particular that considerable attention 
has been paid in the graduate laboratory to the mineral nutri- 
tion or salt requirements of the higher plants as affected by 
hydrogen ion concentration. Likewise, various aspects of the 
relation of hydrogen ion concentration to other life phe- 
nomena have received extensive consideration. 
Allen, E. R. ‘‘Some Conditions Affecting the Growth and 
Activities of Azotobacter chrooecoccum.’’ Ann. Mo. Bot. 
Gard., 1919. 
Allen, E. R., and Davisson, B. 8. ‘‘An All-Glass Nitrogen 
Apparatus.’” Ann. Mo. Bot. Gard., 1919. 
Burt, E. A. ‘‘An Edible Garden Hebeloma.’’ Ann. Mo. 
Bot. Gard., 1919. 
Burt, E. A. ‘‘Merulius in North America, Supplementary 
Notes.’’ Ann. Mo. Bot. Gard., 1919. 
Burt, E. A. ‘‘Protomerulius Farlowii Burt, n. sp.’’ Ann. 
Mo. Bot. Gard., 1919. 
Burt, E. A. ‘‘The Thelephoraceae of North America. XI.’’ 
Ann. Mo. Bot. Gard., 1919. 
Dodge, C. W. ‘‘Tyrosin in the Fungi: Chemistry and 
Methods of Studying the Tyrosinase Reaction.’? Ann. Mo. 
Bot. Gard., 1919. 
Duggar, B. M. ‘‘Botany.’’ Am. Year Book, 1919. 
Duggar, B. M. ‘‘The Micro-Colorimeter in the Indicator 
Method of Hydrogen Ion Determination.’’ Ann. Mo. Bot. 
Gard., 1919. 
Duggar, B. M. ‘‘Some Factors in Plant Physiological Re- 
search.’’ Plant World, 1919. 
Duggar, B. M. (Thirty-five abstracts of physiological arti- 
cles in) Bot. Abstr., 1919. 
Duggar, B. M., and Davis, Anne W. ‘‘Seed Disinfection 
for Pure Culture Work: Use of Hypochlorites.’’ Ann. Mo. 
Bot. Gard., 1919. 
Duggar, B. M., and Dodge, C. W. ‘‘The Use of the Color- 
imeter in the Indicator Method of H Ion Determination with 
Biological Fluids.’’ Ann. Mo. Bot. Gard., 1919. 
Lurie, A., and Pring, G. H. ‘‘Plant Curiosities.’’ Jour. 
Internat. Gard. Club, 1919. 
McGinty, R. A. ‘‘Diastase Activity in Relation to Stage of 
Development and Carbohydrate Content of the Tuber of 
Solanum tuberosum.’’ Ann. Mo. Bot. Gard., 1919. 
Matsumoto, T. ‘‘Culture Experiments with Melampsora 
in Japan.’’ Ann. Mo. Bot. Gard., 1919. 
