Book excerpt: Arnold O. Beckman was a legend in his time: the blacksmith's son who grew up to play a pivotal role in the instrumentation revolution that dramatically changed science, technology, and society. From his rural boyhood world of farming and woodworking, through his service in the U.S. Marines and his appointment to the Caltech faculty, to his path-breaking creation of the pH meter, the DU spectrophotometer, and the establishment of the Beckman Instruments company, this work portrays an individual whose ingenuity and integrity made him a scientific leader and industrial pioneer. It also discusses his role in California and national politics, and his career as a major philanthropist. Arnold Beckman's story is inseparable from that of the 20th century--a very inspiring read. Included with this biography is a video portrait of Arnold Beckman, in CD-ROM format for both PC and Mac. You will see and hear Dr. Beckman talk about his early life, his marriage to Mabel, and his philosophies of inventing, education, and philanthropy. The CD-ROM was produced by Jeffrey I. Seeman.