Abstract

<h2>Acta Crystallographica Section A</h2><h3>Crystal Physics, Diffraction, Theoretical and General Crystallography</h3><h3>0567-7394</h3> <h2>notes and news</h2> Volume 27 Part 5 Page 496 September 1971 <h2>Notes and News</h2> Notes and News Announcements and other items of crystallographic interest will be published under this heading at the discretion of the Editorial Board. The notes (in duplicate) should be sent to the Executive Secretary of the International Union of Crystallography (J. N. King, International Union of Crystallography, 13 White Friars, Chester CH1 1NZ, England). Sir Lawrence Bragg 1890-1971 Sir Lawrence Bragg, F.R.S., Professor Emeritus and former- ly Director of the Royal Institution, died on 1 July 1971. Sir Lawrence, in conjunction with his father Sir William Bragg, carried out the earliest crystal structure determina- tions by X-ray spectrometry, receiving for this work the Nobel Prize for Physics in 1915. It was as a result of these investigations that it first became possible to obtain absolute values of lattice parameters. Sir Lawrence and his school thereafter developed the quantitative aspects of X-ray dif- fraction techniques and worked out large numbers of more complicated crystal structures, especially those of silicate minerals. Sir Lawrence took a leading part in the formation of the International Union of Crystallography