What Have We Learned About Elementary Particles from Photon and Electron Interactions?

In trying to write this report I find myself in limbo. I am announced as speaking on "What We Have Learned” at the Opening of this conference prior to the presentation of many new and more precise experimental results — and in particular before the disclosure of first results from SLAC at significantly higher energies and momentum transfers than heretofore available. My dilemma is that I am aware of these results and therefore know to discard as rubbish much of what I might have said otherwise. On the other hand, I am also unable to present wise or even reasonable interpretations or analyses since no new data has yet been presented. So, I have nothing t o say and for the moment I sit in limbo awaiting to be anointed by all the new data during the subsequent sessions of this sympoSium and awaiting to follow my experimental guides and, to quote from Dante's. Divine Comedy [Inferno; Cant-o 34], to. be ”issued out, again to see the stars." I would much prefer a divining red to a divine comedy, however. I will attempt no completeness of coverage. That comes later in the conference. Several problem areas have been and continue to be of interest to me, and to these I will speak. Finally, I can humbly advise you to listen closely because the emphasis in my remarks will plainly provide clues as to some of the real live new results you'll learn of starting tomorrow.