Lin Qiu said, "The hole needs to be of moderate size. If it's too small, it'll get clogged easily. If it's too large, it'll consume a lot of sand and won't be convenient for us to make smaller hourglasses."
Ling Yun felt that the term "hourglass" was very vivid.
"It doesn't matter. The hourglass used to calibrate the time can be made bigger at the beginning, and then it can be gradually refined."
Ling Yun said.
Lin Qiu thought about it and agreed. "Then let's do as you say. However, the hourglass must be placed in a drafty place indoors so it won't be disturbed by other factors. The sand must also be fine and dry."
"I remember that."
Ling Yun felt that calibrating the time would make a great contribution to the tribe.
"Okay, stop playing with this dirty thing." Song Mu took all the sand and skull from Lin Qiu's hands, and then wiped Lin Qiu's hands with wet animal skin.
Lin Qiu said, "In addition to the length of each day, we also need to determine the exact number of days in a year. There's no rush for this. We've already missed the winter season, so we need to wait until the summer. We'll measure the length of the shadow every day at noon, record the day with the shortest shadow, and then wait until the summer of next year to observe again. The time interval between the two shortest shadows will be the exact number of days in a year."
What Lin Qiu said this time left Ling Yun and Song Mu confused.
"This is because the sun hits Somali at a different angle every day," she said.
Lin Qiu gave Ling Yun and Song Mu a geography lesson. The two big tigers seemed to find it difficult to accept that the Somali Continent was on a spherical "planet".
Although the Somali continent has endless mountains, the ground is flat after all!
"If you don't believe it, forget it."
"No, we...believe!"
"We believe everything you say!"
Lin Qiu knew that it would be difficult to get Ling Yun and Song Mu to agree with her story at the moment, but seeing that they believed her just because she said it, she couldn't help but smile.
"If you don't believe it, then don't believe it. If you really have the ability, just keep running west or east. Maybe when you get old you can run back to the starting point."
Lin Qiu's words were so mysterious that Ling Yun hugged Lin Qiu and rubbed him: "I won't run away. I will always stay by your side. I don't care whether the Somali Continent is round or flat."
Lin Qiu touched the tiger's head.
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