Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 250
of the air currents which the smokerenders apparent ? 2. What is the cause of these currents ? Experiment 7. Make a wooden or metalbox of the form shown inFig. 186. The front shouldbe a pane of glass which slidesinto its place through grooves.Cut two holes in the top ofthe box and over each… … 242 PHYSICAL SCIENCE. Describe and explain the currents of air observed.Close the chimney B with your hand. 1. What happens after a short time ? 2. Explain the reason. Experiment 8- Place a lighted candle in a large glass jar (a candy jaranswers well), and insert a perfor-ated cork into which glass…
Physics
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