This is an English language adaptation of a book which was published in Welsh by the same author by UWP, Evan James Williams: Ffisegydd yr Atom. The book discusses his career – what he achieved along those he worked with and the places he worked, most importantly the Physics Department at Aberystwyth University – and outlines his scientific service during the war. It also looks at the man himself – his upbringing in a Welsh speaking home and community in Ceredigion - through the accounts given by those who knew him.

For the Recorde is accessible to a wide audience, and readers will find themselves smiling as they read, sometimes shedding a tear, and occasionally scratching their head. It shows that maths is developed by real people having a range of emotions, just like everybody else. The book is illustrated throughout with photographs of the mathematicians and the places in Wales which they’re linked with, and also contains some mathematical symbols, patterns and puzzles.

Bohr's first acquaintance with the subject of penetration of charged particles through matter was as early as in 1912 when he treated the absorption of &agr; and &bgr; rays on the basis of Rutherford's atomic model. From then on he kept a lifelong interest in the subject, often using it as an important test of the methods of atomic mechanics. His last paper on penetration, written together with Jens Lindhard, dealt with electron capture and loss and was published in 1954.Part I of this volume follows Bohr's work on penetration theory based on classical mechanics. Part II deals with the general theory of penetration, taking quantum-mechanical considerations into account.

List of members.