Descarga la aplicación para disfrutar aún más
Vista previa del material en texto
Acknowledgements THE author wishes to thank the following Examination Boards for permission to publish questions set in their papers: The University Press, Cambridge (C.S.), The Secretary, Natural Science Scholarships, Oxford (O.S.), Oxford and Cambridge Schools Examination Board (O. & C) , The Senate of London University (Lond.), Northern Universities Joint Matriculation Board (N.U.J.M.B.). The symbols in parentheses are those used in the text to denote the sources of the various questions. Some indication is given whether the questions are Advanced level (A) or Scholarship level (S). The information and diagram on the zinc blast furnace were kindly provided by Imperial Smelting Processes Ltd. of Avonmouth. The author would like to thank Dr. J. E. Spice for reading the manuscript and for his helpful advice. D. M. McC. S. xiii
Compartir