Experiments on Inelastic Electron Scattering

I want to take a little bit of your time to review some of the kinematics - in this respect my talk overlaps a little of Dr. Bjorken's - as seen by the experimenter. The reason I do this is connected with a statement Dr. Bjorken made to the effect that the only thing we understand in this field is kinematics - that was theorist speaking - and now I want to prove to you that the experimenters do not even understand that, because it is historically true that every experimenter who arrives on the scene in inelastic electron scattering prefers to invent his own notation to describe something which was probably described rather well by Weisacker and Williams in 1930, and can be found in the book by Panofsky on Electricity and Magnetism. Some of the experimenters have read this and have invented a notation, but unfortunately this notation differs from that of the theorist and all of the data that I will show you has been analyzed in terms of that experimental notation. So I have to say a word about that, and I wll. That is the first part of my talk.