110 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1959 
In November 1958, the Research Corporation of New York granted 
funds to the Division for the installation of a radioisotopes laboratory 
and for construction of greenhouse facilities and control rooms. The 
installation of the radioisotopes laboratory is well underway, and 
it should be in operation in the near future. The greenhouse is ex- 
pected to be completed by the fall of 1959. 
PUBLICATIONS 
Mou C. C., and WirHRow, R. B. Nonionizing radiant energy as an agent in 
altering the incidence of X-ray-induced chromatid aberrations. II. Reversal 
of the far-red potentiating effect in Vicia by red radiant energy. Radiation 
Res., vol. 10, pp. 18-19, 1959. 
SHROPSHIRE, WALTER A., JR., and WIirHROW, Rosert B. Action spectrum of 
phototropie tip-curvature of Avena. Plant Physiol., vol. 33, pp. 360-365, 
1958. 
WirHrow, Roserr B., and Kuern, W. H. Action spectra and kinetics of photo- 
morphogenesis. Atti del 2° Congresso Internazionale di Fotobiologia. 
Edizioni Minerva Medica, pp. 443-451. Torino, Italia (1958). 
Respectfully submitted. 
F. L. Wuterte, Director. 
Dr. Lronarp CARMICHAEL, 
Secretary, Smithsonian Institution. 
