Air pollution in a city street

This paper is included in the series to exemplify the excellent work carried out by Pat Lawther and his colleagues at the MRC Air Pollution Research Unit at St Bartholomew's Hospital Medical College. (It may not have escaped the notice of readers how many of these papers have emanated from units now sadly closed.) Lawther made a remarkable contribution to the understanding of the effects of air pollution by sulphur dioxide and the symptoms of chronic bronchitis and showed how much things improved after the burning of coal in domestic fires had been prohibited. Lawther is one of the nicest men it has been my pleasure to be associated with; he is fair and openminded, extremely kind, cultured and a delightful companion, especially over a pint of beer. His lec-