Chuck Swindoll writes,
I remember only two things from my high school chemistry class. First, I got rid of a wart on the back of my right hand through applications of sulfuric acid for thirty-three consecutive days. Second, I watched the slow death of a frog in an unforgettable experiment.
My teacher placed the hapless creature in an oversized beaker of cool water. Beneath the beaker he moved a Bunsen burner with a very low flame so that the water heated very slowly—something like .017 of a degree Fahrenheit per second. In fact, the temperature rose so gradually that the frog was never aware of the change. Two and a half hours later the frog was dead. . . boiled to death. The change occurred so slowly that the frog neither tried to jump out nor released a complaining kick.