human
This redness of the air will not trouble us a whit. Look! you can see no tinge of red between here and that huge wall yonder, nor anywhere along the ground as far as you can see. It is so slight a colouring that it is only noticeable in vast reaches of atmosphere, like the blue colour in our own air. See here, where a small cloud obscures the sky there is no ruddy tinge. There is no more colouring-matter in this than there is indigo in our own air. The amount of it is so infinitely small that it will never trouble us. Now, if it only contains oxygen enough, we are sure of life in it.
gpt
Yes, if they will leave us alive to breathe it,
human
The air outside shows a pressure of only eleven, while we have eighteen inside, he said.
gpt
I will bring in the discharging cylinder full of the outer air, and by keeping it upside down the lighter air will remain in it. Then, if a candle flame will burn steadily in it, the oxygen we need is there.