9 
D3. Cytology.—A course of lectures and laboratory work on 
cell structure and physiology. Methods of cytological technique, 
and practice in accurate interpretation of cell phenomena. Pre- 
requisite, satisfactory college courses in general botany and plant 
physiology. 100 credit hours of work. Hours to be arranged. 
Dr. Olive and assistant. 
D4. Experimental Evolution.—Detailed studies of the nature 
and causes of variation and heredity. Some of the subjects con- 
sidered are: Historical Resumé of the Evolution Theory, Physical 
Basis of Inheritance, Inheritance of Acquired Characters, Kinds’ 
and Causes of Variation, Mendelism, Biometry, Principles and 
Technique of Plant Breeding. This course is open to students of 
college rank with a knowledge of the elements of physics, chem- 
istry, geology, botany, and zoology. The work is primarily in- 
tended for students in pure science, and for agricultural or horti- 
cultural students fitting themselves for various professional ac- 
tivities in these particular fields. Three lectures and two labor- 
atory periods a week. 100 credit hours of work. Hours to be 
arranged. Dr. White. 
D5. Phytogeography.—A course dealing with plant distribution 
over the earth. Prerequisites are courses in plant ecology and 
geology, and a good general knowledge of climatology and system- 
atic botany. 50 credit hours of work. Hours to be arranged. 
Mr. Taylor. 
D6. Seminar and Journal Club.—A bi-weekly meeting of the 
Garden Staff and advanced students, for the discussion of funda- 
mental problems of botany or of general biology, and for the 
review of pertinent botanical literature. Open to others on in- 
vitation. 
Graduate Study and Botanical Research* 
D7. Research in Plant Physiology.—Independent investigation 
of problems dealing with plant functions. Thesis. Dr. Gager. 
* Courses of graduate rank offered by the Botanic Garden, when ap- 
proved by the Faculty of the Graduate School of New York University, 
are listed as courses in the Graduate School, and are given the same credit 
as other graduate courses. Properly qualified students who take these 
courses may present them in satisfaction of the requirements for advanced 
degrees given by the University. Graduate credit has also been allowed 
elsewhere for stich advanced work done at the Garden. 
