356 Transactions of the South African Philosophical Society. 



Heim, G. 1st eine Abnahme der Goldproduktion zu befiirchten ? 

 Eine Vortrage zur Wahrungsfrage. 

 Berlin, 1893, 8vo, 68 pp. 



Helmhacker, E. Ueber das Vorkommen des Goldes in Dioriten 

 nnd Serpentinen. 



AVien, Oesterr. Zs. Bergw., 28, (1880), 97-99, 110-113, 127-128, 155-156, 172-177, 

 pi. iv. 



Henderson, J. A. L. On a new occurrence of apophyllite in 



South Africa. 



London, Mineral Mag., 11, 1895-97, 318-322. 



Stuttgart, N. Jahrb., 1899, 1, 33. 



Leipzig, Zs. Krystallogr., 31, 1899, 198-199. 



Petrographical and geological investigations of certain 



Transvaal norites, gabbro, and pyroxenites, and other South African 



rocks. 



London, 1898, 8vo, 56 pp., 5 pi. 



Heneage, E. F. The phenomena of the diamondiferous 



deposits of South Africa. 



London, Trans. Inst. Min. MetalL, 12, (1902-03), [8vo, 13 pp.]. 



Mining, J., 72, 1902, 1608-1609. 



Leipzig, Geol. Centralbl., 3, 1903, 329. 



Henkel, C. C. The Native or Transkeian territories [List of 



minerals] . 



Hamburg, 1903, 8vo, 124 pp., map. 



>urn, G. G. Griqualandite, a pseudomorph of crocidolite. 

 London, Chem. News, 55, 1887, 240. 

 Leipzig, Zs. Krystallogr., 15, 1888-89, 447. 



Heslop, W. T. Later volcanic eruptions on the Witwatersrand. 

 [Discussion, v. Frames, M. E., and Draper, D.] 

 Johannesburg, Trans. Geol. Soc. S. A., 3, 1898, 49-52 and 69 [reply] . 



Contribution to discussion on Professor Prister's paper on 



" Glacial Action." 



Johannesburg, Trans. Geol. Soc. S. A., 3, 1898, 89-91. 



The coal-fields of Natal. 



Newcastle, Trans. Inst. Min. Eng., 18, 1900, 410. 

 London, Mining J., 70, 1900, 1224. 

 Berlin, Zs. prakt. Geol., 1900, 390-391. 



On the Natal coal industry. 



London, Colliery Guard., 81, 1901, 479, 515, 740. 



