Abstract

In this paper I will examine the history of the first three, of a sequence of five, experiments performed by the Mann-O'Neill collaboration at the Princeton-Pennsylvania Accelerator. The experiments were conducted over a period of four years and measured aspects of K+ meson decay. Each of the experiments was done with essentially the same basic apparatus, with modifications for each of the specific measurements. We will see the increasing expertise of the experimenters as the experiments progressed. The third measurement was technically more difficult and built upon the acquired knowledge of how the experimental apparatus worked