Through A Brick

"You wouldn't have believed it possible to blow out a candle flame hrough a brickbat," remarked a celebrated physicist, whose penchant is to give scientific research a practical bearing. "It can be done, however, and it illustrates the all-pervasive qualities of air. Most rooms are largely ventilated through their walls, and the briat and mortar are merely rudimentkry lungs, which take in and throw out the atmosphere with little hindrance. "You may try the experiment yourself. Place a candle on the other side of your brick and use two funnels, with the flaring ends on the opposite sides of the brickbat with the small end of one in line with our mouth and the small end of the other trained on the candjfi flame. The least breath will make the light flicker, and a hearty expiratlon will extinguish it altogether. Try t and see."