363 
Four credits. Fee, $10. Thursdays, 4-6 p.m., beginning Sep- 
tember 23. Miss Rusk. 
B17. Genetics——An introductory course in heredity and 
variation, including discussion of Mendelian principles, the phys- 
ical basis of heredity, sex linkage, factor linkage, factor interac- 
tion, and quantitative inheritance. Laboratory work on plant ma- 
terial and Prosophila. Prerequisite: an elementary course in 
botany. (Not given in 1937-38.) Miss Rusk. 
C. Children’s Courses 
More than thirty separate courses are given Saturday mornings 
for boys and girls from eight to nineteen years old in the spring 
fall, and winter. 
; 
The children are grouped according to age and experience. 
For example, under I (below), twelve separate courses are given; 
under II, four separate courses; under III, fourteen. Under IV, 
the Outdoor Garden, 200 children are working from late April to 
mid-September, This does not represent one course, but many 
courses combined under one heading, ‘ The Outdoor Garden.” 
Miss Shaw and Assistants. 
I, The Fall Course takes up nature study on the grounds; 
plant propagation in the greenhouses, using stem and leaf cuttings ; 
bulbs and corms; making of terrariums and dish gardens.  En- 
rollment limited to 175 children. Fee, ten cents. Saturday morn- 
ings, 9-11:15, October 16 to December 18. 
II, Winter Course.—Children who have shown unusual! 
ability are chosen from the fall group f¢ 
Group limited to 50. No fee. Saturday mornings, 9-11:15, Jan- 
uary 15 to February 26. 
III. Spring Course.—Nature study and preparation for the 
outdoor garden, including studies of seed germination, seed sowing 
in the greenhouse, and the making of garden plans. All candi- 
1 early winter work. 
7 
dates for the outdoor garden must be in spring classes. [nroll- 
ment limited to 200. I’ee, ten cents. Saturday mornings, 9- 
11:15, March 12 to April 9. 
IV. Outdoor Garden Course.—The outdoor garden is open 
throughout the summer season, and time is arranged to fit in with 
