Forty years on... HANDLEY PAGE'S FOUR DECADES OF ACHIEVEMENT" () To those have taken part, it will be interesting as a reminder of what already has been done in the past. For those still engaged in this field and, for those who are just entering it, there lies before them an immense vista of scientitfic discovery and engineering application as great, if not greater, than at any time in the history of this new art. To all those this book is commended as a brief account and in the hope that it may be an