—, Peruvian, characteristics of ancient and modern, S. G. Morton, xxxviii, 361f, 365.f
Radiant heat, transmission of, M. Melloni, xxvii, 228.
— —, B. Powell, xl, 313.
Radiation of heat, A. D. Bache, xxx, 16; xxxiv, 39.
— —, apparatus for illustrating, xxviii, 320.f
Radius of the earth, xxxi, 234.
Rae, J., balloon raised by solar heat, xxxiii, 196.
Rafinesque, C. S., progress of vegetation near Philadelphia, i, 77.
—, on atmospherical dust, i, 397.
—, on the genus Flœrkea, i, 373.