54 
1. The Armillary Sphere in the center of the paved compass in 
the Laboratory Plaza. 
2. The pedestal of Carver black granite supporting the Sphere, 
and the bronze band around the pedestal. 
3. The bronze tablet to mark the sphere. 
4. The terrazzo paving of the compass. 
5. Four vases in the Laboratory Plaza. 
6. Construction of the Overlook, with seats, at the north end 
of the Rose Garden, 
7. Bronze tablet to mark the Overlook gift. 
APPENDED REPORTS 
The keports on Research for 1933, the administrative depart- 
mental reports, and Appendices 1-8, which follow this report, 
contain more detailed information concerning the year’s activities 
and accomplishments. 
Respectfully submitted, 
C. STUART GAGER, 
Director. 
REPORTS ON RESEARCH FOR 1933 
PLANT PATHOLOGY 
By Grorce M. Reep 
Studies on the Inheritance of Resistance of Oat Hybrids to Loose 
and Covered Sinitl 
Eexpertments with the Second Generation of Oat Hybrids. The 
second generation plants of four oat hybrids, Canadian  Mon- 
arch, Canadian & Monarch Selection, Gothland & Black Mesdag, 
and Danish Island & Monarch, were available for the study of the 
inheritance of resistance to loose and covered smut. Two series 
of plants of each hybrid were inoculated, one with the loose smut 
and the other with the covered, and the percentage of susceptible 
plants determined. 
Hybrid 79, Canadian < Monarch, was represented by three 
crosses, and is a hybrid between the variety Canadian, susceptible 
