Leeds University Library


At the time (Summer 1913), it was perhaps the Braggs' paper on the structure of the diamond which was of interest way beyond the scientific community: here at last the arrangement of atoms in the most precious and hardest gemstone was determined. The raw data for diamond is on pp. 3, 12-15 and 24-27 of the notebook and there is a sketch-graph of the spectra from the (111) planes (Rh X-rays) on p 15 (as shown in figure 8a). The graph in Figure 8a is reproduced in the joint paper, The Structure of the Diamond(14), except that the angle is plotted as θ (crystal glancing angle) instead of 2θ (ionization chamber angle).