The air-brake.

Some idea of the power of an air brake may be gained from the following facts: It takes powerful locomotive drawing a train of 10 passenger cars a distance of about five miles to reach a speed of 60 miles an hour on a straight and level track. the brakes will stop the same train from a speed of 60 miles an hour in 700 feet. Roughly it may be stated that a train may be stopped by the brakes in about 3 per cent. of the distance that must be covered to give it its speed. There is still an opportunity for some inventive genius to design a brake that would automatically check parliamentary debates after the hot air had passed through the exhaust pipes.—Vancouver Province.

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