“…The more theoretical papers include a modified Silberstein model of anisotropy (396), interactions in vibrating molecules (600), evaluation of zeta sums for interaction in axially symmetrical molecules (364), force constants in polyatomic molecules (136, 592), bond energies and bond distances (225, 277), the character of chemical binding from infrared spectroscopy (397), bond moments from intensities (533), a new relation between potential energy and internuclear distance (356), spectroscopy from the point of view of the communication theory (175, 315), scattering of radiation by spheres (100), selection rules in crystals (620) and in linear molecules (189), sum rules for isotopic molecules (140), thermal vibration amplitudes (138), rotational line widths (457), centrifugal distortion effects (318), calculation of frequencies in molecules with many atoms and little symmetry (166), perturbation theory applied to the F and G matrix method (272), symmetry factoring (117), linear combinations of S-functions (234), the pyramidal X Yz molecule (436), and absorption induced by static electric fields (120).…”