human
It is remarkable that, a few days later, I saw in the Underground one of those I had marked. The chalk mark was still quite distinct. She was not in my compartment, but I noticed her as she stepped out on to the platform at Baker Street. I suspect she was on her way to Madame Tussaud's waxwork exhibition, to instruct her mind there. But I was more fortunate a week later when I was at St. Albans. I had an uncle living there from whom I had expectations, and I paid him a visit. Whilst there, a lecture was to be given on the spectroscope, and as my acquaintance with that remarkable invention of modern times was limited, I resolved to go. Have you, my friend, ever taken up the subject of the photosphere of the sun?
gpt
Never.
human
Then let me press it upon you. It will really supply a large amount of wing-pulp, if properly assimilated. It is a most astonishing thought that we are able, at the remote distance at which we are from the solar orb, to detect the various incandescent metals which go to make up the luminous envelope of the sun. Not only so, but we are able to discover, by the bars in the spectroscope, of what Jupiter, Saturn, and so on are composed. What a stride astronomy has made since the days of Newton!
gpt
No doubt about it. But I do not want to hear about the bars, but of the chalk marks on the Merewigs.