What is the fine-grained topic of the following text: A few months before he spoke at Yale, Sir William Osler had crossed the Atlantic on a great ocean liner where the captain, standing on the bridge, could press a button and –PRESTO– there was a clanging of machinery and various parts of the ship were immediately shut off from one another – shut off into watertight compartments. Only return the topic.
Sir William Osler's ocean liner journey.