"If penicillin can cure those that are ill, Spanish sherry can bring the dead back to life."

"A good gulp of hot whisky at bedtime—it's not very scientific, but it helps."

"It is not difficult to make microbes resistant to penicillin in the laboratory by exposing them to concentrations not sufficient to kill them."

"That's funny."

"I had no idea that I had stumbled on to a subject that would prove to be of such immense importance."