Explore "The Librarian at Play" by Edmund Lester Pearson on Textopian. Read with annotations and highlights.
"We are thinking of calling them 'interest gauges," said the agent, "but perhaps you can suggest a better name."
I took one of the little instruments and examined it. Hardly over an inch long, with its glass tube and scale, it resembled a tiny thermometer. The figures and letters were so small that I could not make them out, though they became clear enough through a reading-glass.