
Top (l to r): Diagramme de Laue de ClO3Na montrant les reflexion diffuses. From the first article in the first issue of Acta Crystallographica (written in French by a Spanish author Julio Garido [Acta Cryst. (1948), 1, 3-4, doi: 10.1107/S0365110X48000028]; P. P. Ewald, first president of the IUCr (1948) [From the collection of R. A. Young]. Center: Delegates at the IUCr Congress and General Assembly in 1948 Identifications can be found at www.iucr.org/gallery/individual-no-hires?show=24141. Bottom: Structure projected on (010), z coordinates indicated. Hydrogen bonds dotted. From the second article in the first issue of Acta Crystallographica (written by Clews and Cochran, Cavendish Laboratory, Cambridge, England [Acta Cryst. (1948). 1, 4-11, doi: 10.1107/S0365110X4800003X].