In this book, Robert Leeson and Charles Palm have assembled an amazing collection of Milton Friedman's best works on freedom. Even more amazing is that the selection represents only 1 percent of the 1,500 works by Friedman that Leeson and Palm have put online in a user-friendly format-and an even smaller percentage if you include their archive of Friedman's audio and television recordings, correspondence, and other writings. This book and the larger online collection are sorely needed and very welcome. Milton Friedman deserves to be read in the original by generation after generation. These days, many people channel Friedman to support their own views, which sometimes are quite contrary to his actual views. With so much of it now readily available, everyone will find it easier to remember and learn from what he actually wrote and said. Readers will find the book refreshing whether or not they are already familiar with Friedman's work.

This volume is the issue of the symposium 'Theoretical Approaches to Complex systems', held in Tlibingen on June 11 and 12, 1977. The meeting was dedicated to the late Ernst Pfaffelhuber of the Institute for Information Sciences, University of Tlibingen, in memory of his con- tributions to information theory, physics, and biology and of his many fruitful contacts with the Tlibingen scientists gathered on this occa- sion. We would like to express our gratitude to all participants for their willingness to offer a weekend, for their help and the care they took in writing a contribution to this volume. R. Heim G. Palm CONTENTS Introduction H. Hahn 3 Existence Criteria for Bifurcations as Stability Criteria for Critical Nonlinear Control Systems G. Palm Asymptotic System Analysis and Goal Functions 51 O. E. ROssler and P. J. Ortoleva 57 Strange Attractors in 3-Variable Reaction Systems w. u. an der Heiden 75 Structures of Excitation and Inhibition T. Poggio and V. Torre 89 A new Approach to Synaptic Interactions W. Reichardt Figure-Ground Discrimination by the Visual **...**. *. ** 117 System of the Fly M. Conrad Evolution of the Adaptive Landscape ********. *. **** 147 V. Braitenberg Cell Assemblies in the Cerebral Cortex *. ****. *. ***** 171 D. Varju Excitatory and Inhibitory Processes Giving Rise ********* 189 to the Delayed Response in the Retinal Ganglion Cell of the Frog R. Heim 209 On Constrained Transinformation Functions M.

Three children go on a night-time adventure. What happens when three children decide to go on a night-time adventure? This is a fun story with delightful illustrations. Stars of Africa is an exciting reading series for learners from Grade R to Grade 7. The series contains a wonderful selection for Foundation Phase learners to build their confidence as readers, widen their knowledge as learners and increase their reading pleasure.There are two types of books in the series:* Stories: The stories are beautifully illustrated in full colour, set in urban and rural envrionments in countries all over Africa, and include titles to appeal to every child.* Info (Information) Books. The info books introduce concepts and content from all learning areas and are illustrated in full colour to stimulate reading and learning.The books are divided into four levels:* Starting - for Grades R and 1* Practising - for Grades 2 and 3* Improving - for Grades 4 and 5* Independence - for Grades 6 and 7 Within each level, the books have been graded further for difficulty into three sub-levels: A, B and C. For learners in Grades R-3, Stars of Africa has:* books with no text, and beautiful illustrations* books with very simple, repeated text* Big Books, for teachers to use with a whole class* stories and information books* books with simple captions* books with photographs* counting books and alphabet books* a book with rhymes, poems and song* books about life and growing up in Africa* books that provide knowledge of and encourage a love for the environment* a dictionary activity book* a book that deals with the experience of AIDS* a book that celebrates children's rights* a personal dictionary Activity Book that learners can use to compile their own word list for each letter of the alphabet.