Thomas Starr King Middle School - Echoes Yearbook (Los Angeles, CA)

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Aufomdrive Invesfigafion Learning +o Use 'the Machines Eighfy-'Eve

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tube, one student's lamp-chimney for a test-tube with the bottom broken outj, two two-hole rubber stoppers, one one-hole rubber stopper, one glass Y-tube, one glass funnel, one Bunsen burner, one I'Ioffman's clamp, and a length of rubber tubing for connections. When the Bunsen burner is lit, the large testtube, or boiler is heated, heating the Water. The water then rises up the length of tubing to the top of the other test-tube, or radiator, where it cools, sinking down the other length of tubing to the boiler , Where it is again heated, performing the same cycle of operations. The purpose of the funnel is to serve as an expansion tank , giving the water room to expand. If there were no room for the water to expand the water would force the tubing apart, Wrecking the apparatus. The purpose of the clamp is to act as a valve, letting the air bubbles, which collect at the top of the radiator , escape. In this Way we are able to heat our buildings by hot water, for when 1V2'ltC1' is heated convection currents are set up, causing it to circulate through the building. The fact that Water can absorb a great amount of heat makes it an economical system of heating. . MECHANICAL EXPERIENCE I had visited the paint shop, electric shop, pottery, drafting and ,wood shopg they were all interesting but the one that fascinated me was the auto shop. In every direction different machines met my eyes. I became very greasy in my zeal to examine the many machines. I soon noticed a boy approaching me. He started to speak to me, but before he could do so, I began asking him a stream of questions. In response to my inquiries, he told me that he took auto shop because he liked machinery and expected to be a mechanic. He went through the entire motor with me telling me how the pistons and valves Workedg why a battery was necessary to make the motor gog and numerous other things essential to the mechanism of the motor. Then I watched the teacher conduct one of his classes. He explained to the boys how to remove a Ford camshaft and how to stretch a Ford valve. We were entirely removed from other interests so engrossed were We in the mysteries of mechanisms. Suddenly a bell rang! All rushed to the business of checking in tools and putting parts of-the different autos away. Soon they were running to the washstand, pushing each other as they splashed and laughed. The final bell rang and they joyously rushed out of the shop to' their next class. I looked after them. Lucky-fellows! I am glad that those who found exploratory work interesting may elect it for further work. Dan Daggett, B9. Sam Downing, AS. Eighty-'four

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Making Our Plans Eighfy-six Thrills in fha Woodshop