Zot 
D3. Trees and Shrubs: Fall Course for Employees of the 
Park Department and Others.—Ten Thursdays, 2:30 p.m., Oc- 
tober 8 to December 17 (omitting Thanksgiving Day). Trips in 
parks and woodlands of New York to become acquainted with the 
common kinds of woody plants, both native and cultivated. Simi- 
lar to D2 except that in this fall course the winter characters are 
studied. Fee to non-members, $5. First meeting at Brooklyn 
Botanic Garden. Park employees will arrange with their super- 
visors the necessary time for attending. Dr. Graves, Mr. Doney. 
D4. Gardening: for Employees of the Park Department.— 
Twelve Wednesdays, 3:30 p.m., September 23 to December 16 
(omitting the day before Thanksgiving Day). Soils and fertiliz- 
ers; planting and transplanting (trees, shrubs, bulbs, perennials, 
rerbaceous perennials, in- 
— 
etc.) ; lawn-making and maintenance ; 
cluding bulbs; annuals and biennials ; rose growing, rock and water 
gardens; insect and fungous pests; pruning; plant propagation ; 
principles of greenhouse management. Fee to non-members, $0. 
Park employees will arrange with their supervisors the necessary 
time for attending. Mr. Free. 
E. Investigation 
1. Graduate Work for University Credit 
By the terms of a cooperative agreement between New York 
University and the Brooklyn Botanic Garden, properly qualified 
graduate students may arrange to carry on independent investiga- 
tions in botany at the Garden under the direction of members of 
the Garden Staff, who are also officers of instruction in the Grad- 
uate School of the University. The advantages of the library, 
laboratories, herbarium, and collections of living plants at the 
Garden are freely at the disposal of students registered at New 
York University for such work. Such properly enrolled graduate 
students are charged no additional fees by the Garden. 
Research work in botany presupposes a knowledge of plants ob- 
tained from a study in field and laboratory. Prerequisites include 
college courses along such lines as morphology, physiology, taxon- 
omy, and genetics. Bacteriology and mycology are special pre- 
requisites for E6. For E8, plant pathology and basic training in 
forestry are also required. 
