Letter from R G [Reginald Graham] Durrant, The College, Marlborough, to [Joseph] Larmor Durrant expands on the experiment results he sent to Larmor in his letter from the 5th May, noting he will also send diagrams for this. He considers how the 'diurnal range of temperatures' have affected the results on the jellies in the test tubes, and then explores the production of hydrogen, as well as how he can draw up an equation demonstrating these changes. 7 May 1907