In his 1930 book, Dirac took for granted that measurements could be made, but was very vague about what was actually involved.
I liked quantum mechanics very much. The subject was hard to understand but easy to apply to a large number of interesting problems.
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.
A rare theorist turned experimentalist.
You never find friends them following your advice upon their own affairs; nor allowing you to manage your own.