This volume documents the proceedings of a symposium on "Lung in its Environment" held at the Ettore Majorana 'Center for Scientific Culture, in Erice, Sicily, between 16th June and 21st June 1980. This was attended by about 200 participants drawn from Europe as a whole, but the majority were from Southern Europe. The discussion was recorded either in English or Italian and the tapes were reduced to a verbatim typescript by the Ente Nazionale Interpreti Congresso. The verbatim typescript has been edited using a few guiding principles as follows: - 1. Titles and honorifics have been eliminated unless the statement is addressed to a specific person. 2. The style of the speakers in the discussion has been preserved as far as possible and not reduced to a strictly grammatical format. 3. Where references to illustrations (e.g., on the blackboard) are made, the comments have been left unaltered and many are understandable. Removing them detracted from the sense. 4. The air of informality in the proceedings has been preserved so far as possible. 5. The responsibility for the discussion rests solely with the editors, and no contributor has had the opportunity of correcting what he said. 6. No manuscript was received from two participants, but the discussion of their presentations has been included since it contains some points of substance. 7.

This volume records the proceedings at the Sixth School of Thoracic Medicine held at the Ettore Majorana School of International Scientific Culture in June 1982. Foregathered there were a heterogeneous group comprising clinicians, pharmacologists, pathologists, ultra microscopists, biochemists and immunologists and they presented the eighteen papers seen in the contents list. The discussion which followed each paper was faithfully recorded (and where necessary translated) and may be found after each author's presentation. This free discussion is perhaps the most valuable part of the School of Thoracic Medicine, and most clearly defines the present boundaries of knowledge, and the directions in which enquiry is being pursued. The collaboration of many people made the production of this book possible - for translation and the discussion typescript Miss Guiliana de Ferio; for the final typing and layout Miss Co rinne Wade. The illustrations have been dealt with where necessary by Mr. John Griffiths and the production of the book was done at The Midhurst Medical Research Institute prior to its delivery to Plenum Press."

This volume records the proceedings at the Fifth School of Thoracic Medicine held at the Ettore Majorana School of International Scientific Culture in March 1981. Foregathered there were a heterogeneous group comprising clinicians, pathologists, ultra-microscopists, biochemists, immunologists, cellular biologists and physiologists and they presented the twenty seven papers seen in the contents list. The discussion which followed each paper was faithfully recorded (and where necessary translated) and may be found after each author's presentation. This free discussion is perhaps the most valuable part of the School of Thoracic Medicine, and most clearly defines the present boundaries of knowledge, and the directions in which enquiry is being pursued. The collaboration of many people made the production of this book possible - for the translation and the discussion typescript Miss Guiliana de Ferio, for the final typing and layout Miss Corinne Wade ably assisted by Miss Karen Wadey and Miss Kim Lekstrom. The illustrations have been dealt with where necessary by Mr. John Griffiths and the production of the book was done at The Midhurst Medical Research Institute prior to its delivery to Plenum Press. CONTENTS The Innervation of Bronchial Mucosa * * * * * * * -. * * * * 1 Peter K. Jeffery Cell Division and Differentiation in Bronchial Epithelium * * * * * * * * * * * * * 33 Margaret Ayers and Peter K. Jeffery Cilia * 61 Bjorn A.