Award of the Boyle Medal to Professor John Joltj. 147 



70. On the Radium Content of Deep-Sea Sediments. Phil. Mag. .July, 1908. 



71. Uranium and Geology. President's Address to Section C, Brit. Assoc, 

 Dublin, 1908. 



72. On the Distribution of Thorium in the Earth's Surface-Materials. Phil. 

 Mag. May, 1909. 



73. On the Distribution of Thorium in the Earth's Surface-Materials. Phil. 

 Mag. July, 1909. 



74. On the Radium Content of Sea Water. Phil. Mag. Sept., 1909. 



75. On the Radioactivity of Certain Lavas. Phil. Mag. Oct., 1909. 



76. Pleochroie Haloes. Phil. Mag. Feb., 1910. 



77. Pleochroie Haloes. Nature. Feb. 10th, 1910. 



78. With Arnold L. Pletcheb. — Pleochroie Haloes. Phil. Mag. April, 1910. 



79. On the Amount of Thorium in Sedimentary Piocks — I Calcareous and 

 Dolomitic Eocks. Phil. Mag. July, 1910. 



80. On the Amount of Thorium in the Sedimentary Rocks — II Arenaceous 

 and Argillaceous Bocks. Phil. Mag. Aug., 1910. 



81. Radioactivity and Geology : An Account of the Influence of Radioactive 

 Energy on Terrestrial History. London. Archibald Constable and Co., 1909. 



