THE INDUSTRIAL RESERVE ARMY ISN'T NECESSARILY UNEMPLOYED. Panic at the Economics Department: an instructor who hired out to teach a section of principles gave notice just before classes started. The chairman, assistant chairman, and office staff have managed to re-book 50 of the 80 students affected and we will take care of the other 30. But on top of ramping up for hiring and all the other joys of startup, that's one challenge we'd prefer not to rise to too frequently.