Letters to the Editor

All the Letters to the Editor in this issue are in the same PostScript or PDF file.

Contents

Comment on `Magnetic and electric field strengths of high voltage power lines and household appliances' José Luis Giordano Dept. de Ciencia y Tecnología de Materiales y Fluidos, CPSI, Universidad de Zaragoza, Spain

Twins paradox S R Carson Norton College, Malton, North Yorkshire, UK

On alternative ways of finding the ratio of specific heats of gases Tomas Ficker Physics Department, Technical University of Brno, Czech Republic