es-pond to any particular note, and I hope T)y means ofthe following figure to make it clear to you how thisis done. 74 SCIENCE PRIMERS. [VIORATINO You see a large wheel A to tho right, Avhich isturned hy a handle. Over the circumference or rimof this wheel we have a strong tight strap whichpasses… … its axle—in fact, B may be made to move round veryquickly. You see, too, that B is full of small teeth.Kow there is a hit of card placed at E against theteeth of B, so that each tooth strikes the card as itpasses. Each time the card is struck we hear a sound,because a blow is given by the cai*d to…
Physics
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