Listening to a public lecture

Source A: an original contemporary non-fiction-style account.

I attended the science lecture because the advertisement promised answers to everyday questions. The speaker began with an image of a kitchen sink and asked what we thought would happen next. We guessed, watched an experiment and discovered that several confident answers were wrong. I enjoyed being corrected when the correction arrived with something I could see.

The evening became less successful when questions from the audience turned into speeches. One man held the microphone long enough to provide a short history of his own intelligence. The speaker listened kindly, but several people never had a chance to ask anything. I left impressed by the demonstration and irritated by the unequal distribution of the remaining time. Public learning needs more than an open microphone. It needs somebody willing to protect a question from being buried beneath the performance of asking it.

Source B: an original letter in a nineteenth-century voice. This is a period-voice simulation, not an archival document.

Sir, I write in praise of last evening's lecture, though not because every point was immediately clear to me. The subject was unfamiliar, and the lecturer did not disguise all its difficulty with agreeable anecdotes. I had to listen closely and consult my notes afterwards. This effort was not a defect in the entertainment; it was part of the reason for attending.

I was less pleased by the chairman's refusal to allow questions at the close. Several listeners wished to clarify matters, yet we were told that the hour had expired. A lecture should not become an endless disputation, but neither should its audience be treated as a row of vessels into which information has been successfully poured. Some orderly opportunity for reply would have revealed where explanation remained incomplete. I ask for neither easier subjects nor longer speeches, only a little time in which those learning may make their difficulties known.

Refer to the whole of both sources. Compare the writers’ perspectives on what makes a public lecture valuable and how they convey those perspectives. Support your comparison with evidence from both sources.