First published in 1931, this book is the second edition of a 1917 original. The text provides an account of the method of least squares, aiming to obtain the best interpretation of the results of experiment without consideration of the way in which these results are obtained. Elaborate descriptions of instruments and experimental methods are avoided, allowing for a concise and economical account that concentrates on key elements of the subject. This is a detailed and well-organized book that will be of value to anyone with an interest in least squares and the development of mathematics.

The BBC crime drama series Z Cars was created in 1961 as an alternative to the safe and cosy police series Dixon of Dock Green. While showing hard-hitting stories that reflected the reality of 1960s policing, real policemen followed it avidly while their superiors initially protested. With access to extensive BBC paperwork and series creator Troy Kennedy Martin's own files, this book details the creation and development of the programme through the groundbreaking first season. With many recollections from those involved - actors, writers, directors and sole producer - this book is their story...

With a very well-regarded and- highly-rated season of live BBC TV police drama behind them in early 1962, producer David Rose and story editor John Hopkins consolidated their success with a second run of the series in 1962-1963. All the original cast were initially back, although Jeremy Kemp and Dorothy White would depart the show mid-run and, tragically, Leonard Williams unexpectedly died three months into the season. New actors would also be introduced who would stay with the show for some time - Colin Welland, Robert Keegan and Michael Forrest - as others fell by the wayside before the...