Gisella's School

This week in History 5 I learned about the combine harvester, the solar compass, the propeller, and the mechanical calculator.             On Monday I learned about the combine harvester. The

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This week I learned about the platform scale, the railroad T rail, the multi coil, and the mechanical reaper.             First, I learned about the platform scale. The development of

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This week in history I learned about the microphone, the typewriter, the braille writing system, and the sewing machine. First, I learned abort the microphone. Attempts to amplify sound have

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This week in history I learned about portland cement, electromagnets, the passenger rail, and the match.             First, I learned about portland cement. Portland cement was invented by a man

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