"I'm going for water," Bunker replied.
"Why, we have some in the ice box," cried Sue, for she had had a glass a little while before. "You can drink that water, Bunker."
"Oh, I don't want a drink. Sue. It's the automobile that wants one," Bunker answered.
"How funny!" laughed Sue. "Automobiles can't drink."
"Oh, yes, they can," replied Bunker. "I have to pour water in ours so the engine won't get too hot. It doesn't exactly drink it, but it needs it to cool itself off. That's why I'm going for water now."
"I'll come with you," offered Bunny. And of course where Bunny went, Sue went too. So the brother and sister were soon walking with Bunker down to the spring.
There he filled the pail with water, and, coming back with it, he poured it into what is called the radiator of the automobile—the place where the water itself is kept cool so it will cool the hot engine.
"There!" exclaimed Bunker, when he had finished. "Now the auto has had a good drink it can go to sleep when it wants to."
