The photographs of diffraction patterns were inadvertently misplaced in Fig. 2 of “Low‐Energy Diffraction,” by Lester H. Germer, which appeared in Physics Today (July 1964, p. 19). The above reproduction shows the correct sequence of the diffraction patterns for which the caption read: Diffraction patterns from a tungsten (110) face. A. Clean, 98 volts; B. With half monolayer of oxygen atoms, 115 volts; C. With three‐fourths monolayer of oxygen atoms, 100 volts; D. With full monolayer of oxygen atoms, 75 volts.