ie 6) 
MISSOURI BOTANICAL GARDEN BULLETIN 
B. M. Duggar, February 7, before the Society of Sigma Xi, 
‘Investigations of ‘Ultramicroscopie’ Organisms Inducing 
Plant Diseases.”’ 
B. M. Duggar, April 25, before the American Philosophical 
Society, at Philadelphia, Pennsylvania, ‘‘ Hydrogen Ion Con- 
centration of Nutrient Solutions in Relation to the Growth 
of Seed Plants.’’ 
B. M. Duggar, May 19, before the St. Louis Academy of 
Science, ‘‘Important Factors in the Constitution of Nutrient 
Solutions for the Growth of Seed Plants.”’ 
B. M. Duggar, June 5, before the Cereal Pathologists, ‘‘ Dis- 
ease Resistance in Plants: Immunity.’’ 
B. M. Duggar, June 11, before the Members’ Conference 
of the Chamber of Commerce, ‘‘Why an Art-in-Industry Ex- 
hibition in St. Louis is Indispensable.”’ 
B. M. Duggar, June 18, before the Synapsis Club of the 
Graduate School of Subtropical Agriculture, Riverside, Cali- 
fornia, ‘‘Research Work at the Missouri Botanical Garden 
and Shaw School of Botany.”’ 
B. M. Duggar, June 21, before Pacific Section of the Amer- 
ican Association for the Advancement of Science, Pasadena, 
California, ‘‘Salt Requirements and Hydrogen Ion Concen- 
tration in Solution Cultures for Seed Plants.’’ 
B. M. Duggar, September 18, before the Science Club of 
the Utah Agricultural College, Logan, Utah, ‘‘The Impor- 
tance of an Emphasis upon Research under Existing Condi- 
tions.’’ 
Alexander Lurie, January 8, before Gardeners’ Association 
of St. Louis, ‘‘Pruning.”’ 
Alexander Lurie, January 9, before the St. Louis Florists’ 
Club, ‘‘ Horticulture.’’ 
Alexander Lurie, March 21, before the Bryan-Mullanphy 
School, ‘‘ Vegetable Gardening.’’ 
Alexander Lurie, April 18, before Rose Fanning School, 
‘‘Gardening.”’ 
Alexander Lurie, April 21, before Pierre Laclede School, 
‘*Gardening.’’ 
George T. Moore, January 15, before the St. Louis Natural 
History Museum Association, ‘‘The Educational Value of the 
Missouri Botanical Garden.’’ 
George T. Moore, March 17, before the St. Louis Academy 
of Science, ‘‘Some Novel Uses for Sea Weeds during the 
War.’’ 
George T. Moore, May 3, before Artists’ Guild, ‘‘Plants 
and People.’’ 
