“My story-book is all blue, too,” exclaimed the girl. “What’s it for?”
“Just by way of illustration,” explained the doctor. “The mouths of all of us contain germs of one kind or another. So I’ve assumed that Bob’s mouth has red, and Junkum’s blue, and Miss Twinkle’s green. Every chalk mark shows where you’ve spread your germs.”
“Then the red on the ball is where I wet my fingers for that in-curve,” said Bobs.
“And on my glove is where I caught it,” said Julia. “But what’s the blue doing on my left hand?”
“I know,” announced Bobs triumphantly. “You got that slow drop on the end of your finger and jammed your finger in your mouth.”
“It hurt,” defended Julia. “Look at the walls—and the Indian clubs—and the chair.”
Crayon marks were everywhere.[[2]] In some places it was one color; in others another; in many, a crazy pattern of red, blue, and green.
[2] For this ingenious example of the crayon marks I am indebted to Dr. Charles V. Chapin, Health Officer of Providence, Rhode Island, and a distinguished epidemiologist.
“And if I carried it out,” said the doctor, “your faces would all be as bad.”
“I don’t care!” murmured Betty to Susan Nipper; “I will kiss you even if you do turn green.”