xl SOUTH AFRICA MEDAL. 



47. "Examination of Indicators for Lime Estimations" (with J. Gray). 



(Two papers.) Journ. Chcm., Mctall. & Mining Soc. of S: 

 Africa (1912 and 1913). 



48. " Oxidisers in cyaniding : new theory of solution of gold." Journ. 



Chem., Metal!. & Mining Soc. of S. Africa (1913). 



49. "New Data on atomic weights." Journ. Chcm., Mctall. & Mining 



Soc. of S. Africa (1913). 



50. " Tetrabromodiphenoquinone." Proc. Chcm. Soc. (1913). 



51. "Quinonoid derivatives of dianisidine." Report S.A. Assoc, for Adv. 



of Science (1913). 



52. " Indicators re acidity of mine waters." Journ. Cliein., Mctall. & 



Alining Soc. of S. Africa (1913). 



53. " The nature of solutions of iodine in iodides." Journ. Chem., Metall. 



& Mining Soc. of S. Africa (1914). 



54. "Indicators and true neutrality." Journ. Chem., Metall. & Mining Soc. 



of S. Africa (1914). 



55. "Dust in Mine Air and causation of Miners' Phthisis." Journ. Chem. 



Mctall. & Milling Soc. of S. Africa ('(915). 



56. " Further experiments on the minuteness of the dust in Miners' 



Phthisis." Journ. Chcm., Metall. & Mining Soc. of S. Africa 



(1915)- 



57. "Loss of cyanide and the value of protective Alkali." Journ. Chem., 



Mctall. & Mining Soc. of S. Africa (1915). 



58. "Analysis of Niobium-Tantalum minerals." Journ. Cheni.„ Metall. 



& Mining Soc. of S. Africa (1916). 



59. " New test for Molybdenum." Journ. Chem., Metall. & Mining Soc. 



of S. Africa (1916). 



60. "Formula for calculating humidity of mines." Jouni. Chem., Metall. 



& Mining Soc. of S. Africa (igi'6). 



61. "Nature of dust in silicotic lungs" (with Dr. W. W. Pitchford). 



S.A.I.M.R Bulletin (1916). 



62. " New methods of determining dust in air " (with A. McA. John- 



ston). Report of Miners' Phthisis Prevention Comnvittee 

 (1916). 



63. " Statistical enquiry into sizes of dust found in Silicotic lungs." Report 



of Miners' Phthisis Prevention Committee (19x6). 



64. "Errors and possible accuracy in Analyses." (Pres. Address). Proc. 



S.A. Assoc, of Analyt. Chemists (19 [6). 



65. " The classification of Indicators, with the true reaction of nearly- 



neutral solutions." S.A. Assoc, of A wild. Chemists Pamphlet 

 (1916). 



66. A rapid volumetric method for the analysis of Limestone." Journ. 



Chem., Mctall. & Mining Soc. of S. Africa (1917). 



67. " Volumetric analysis of Ammonium Salts wiin thyitiolphthalein.'' 



Journ. Chcm., Metall. & Milling Soc. of S. Africa (1917). 



68. " Colour and Chemical Constitution : spectra of 47 derivatives of 



phenolphthalein in Alkali and in Concentrated Sulphuric Acid." 

 Trans. Royal Soc. of S. Africa (1917). 



69. "Colour and Chemical Constitution (Pait 11): Mixed or unsym- 



metrical phthaleins." Trans. Royal Soc. of S. Africa (1917). 



70. "Colour and Chemical Constitution (Part III): Orthopara-phtha- 



leins." Trans. Royal Soc. of S. Africa (1917). 



71. " Spectra of Chromium compounds (compared vviih Ruby and Emer- 



ald)." Trans. Royal Soc. of S. Africa lujiy). 



72. "Modern Alchemy and Transmutation and ihc periodic law." Journ. 



S.A. Assoc. Analyt. Chemists ('1917). 



73. " A new Analytical method of Copper." Journ. S.A. Assoc, of Analyt. 



Chemists (1917). 



74. "Colour and Chemical Constitution (Part IV): Highly complex 



phthaleins." Traits. Royal .Soc. of S. Africa (1918). 



75. "Colour and Chemical Constitution (Part V) : The yellow phthaleins." 



Trans. Royal Soc. of S.A. (1918). 



76. "Colour and Chemical Constitution (Part VI) : Ultraviolet spectra of 



phthaleins." Trans. Royal Soc. of S. Africa (1918). 



