The Natural History of Clay

by Alfred B. Searle

24. "Natural History of Coal." E. A. N. Arber. Cambridge University Press. 1911.

25. "Modern Brickmaking." A. B. Searle. Scott, Greenwood and Son. London. 1911.

26. "Die verschiedene Arten der Verwitterung." J. M. van Bemmelen. Zeits. angewandte Chemie. LXVI. Leopold Voss Verlag. Hamburg. 1910.

27. "Pyrometrische Beleuchtung." Carl Bischof. Tonindustrie Zeitung. 1877.

28. "Die feuerfeste Tone." Carl Bischof. Quandt and Haendler. Leipzig. 1904.

29. "The Chemical Constitution of the Kaolinite Molecule." Trans. Eng. Cer. Soc. X. Hughes and Harber. Longton, Staffs. 1911.

30. "Tabellarische Uebersicht der Mineralien." P. Groth. Brunswick. 1898.

31. "West Virginia Geological Survey." III. 1906.

32. "Memoirs of the Geological Survey." London.

33. "The Publications of Stanford's Geographical Institute." London.