"Anyone who chose to get up this thing would of course read up about the polar day, and all that.
Everyone knows that at the poles there is a six-months' day, followed by a six-months' night." "You are a determined sceptic," said the doctor.
"How is it about the polar day ?" asked Featherstone.
"Well," said the doctor, "at the poles themselves there is one day of six months, during which the sun never sets, and one night of six months, during which he never rises.

In the spaces between the polar circles the quantities of the continuous day and continuous night vary in accordance with the distance from the pole.

At the north point of Nova Zembla, 75 degrees north latitude, there is uninterrupted light from May 1st to August 12th, and uninterrupted darkness from November 8th to February 9th.

At the arctic circle at the summer solstice the day is twenty-four hours long.

At the antarctic circle at the same time the night is twenty-four hours long." Upon this Melick filled the doctor's wine-glass with a great deal of ceremony.
"After all those statistics," he said, "you must feel rather dry.