In his 1930 book, Dirac took for granted that measurements could be made, but was very vague about what was actually involved.
W. E. Lamb, Sequential measurements in quantum mechanics, in Quantum Measurements and Chaos, E. R. Pike and S. Sarkar, eds. (Plenum, New York, 1987) pp. 183-193.
Neither Dirac nor von Neumann discussed his measurements in physical terms.Willis Lamb
At the first of the 1960's Rochester Coherence Conferences, I suggested that a license be required for use of the word photon, and offered to give such license to properly qualified people.Willis Lamb
I liked quantum mechanics very much. The subject was hard to understand but easy to apply to a large number of interesting problems.Willis Lamb
In fact, there really is not a new law of nature. It was all in the theory to begin with but nobody worked it out.Willis Lamb
A rare theorist turned experimentalist.Willis Lamb
A gifted experimentalist, and theoretician, in the best Newtonian tradition... His contributions to quantum measurements, and elucidative teachings on quantum mechanics, have not yet received the attention they deserve.Willis Lamb