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The image is a page from a textbook or educational material. It contains several diagrams and text related to meteorology.

The top left features a diagram of a wind vane, labeled "Fig. 13.3 Wind vane." This diagram illustrates the components of a wind vane, including an arrow indicating wind direction, cardinal points (N, S, E, W), a pole, and the earth's surface.

To the right of the wind vane, there's a diagram of a mercury barometer, labeled "Fig. 13.5 A mercury barometer." This diagram shows a glass tube filled with mercury, with labels for "vacuum," "column of mercury 76 cm," "atmospheric pressure," "mercury," and "container."

Further to the right is a diagram of a dry-bulb thermometer, labeled "Fig. 13.6 Hygrometer." This thermometer shows a temperature scale from -20 to 40 degrees Celsius, with the mercury column indicating a temperature above 20 degrees Celsius. There is also text mentioning "Moistened muslim used for wrapping bulb."

Below the wind vane diagram is a diagram of a cup anemometer, labeled "Fig. 13.4 Cup Anemometer." This diagram shows three cups mounted on arms, which rotate to measure wind speed. It indicates a "Vertical Pole" and a connection to a "calibrated dial."

The bottom section of the image contains numbered text. Section "5. Measurement of Relative Humidity" describes a hygrometer, mentioning its use and construction with wet and dry-bulb thermometers. Section "4. Measurement of Pressure" defines a barometer and discusses atmospheric pressure in terms of millibars and millimeters of mercury.

The image is a close-up, slightly angled view of a book page. The lighting is consistent, suggesting an indoor setting. The page is slightly creased and shows some wear, consistent with being from a used book. The background outside the page is dark and out of focus. There is no information in the image that suggests a location in Jalingo, Nigeria.
FM-66btC3

Jun 30, 2026, 4:08 PM

Jalingo, Nigeria

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The image is a page from a textbook or educational material. It contains several diagrams and text related to meteorology. The top left features a diagram of a wind vane, labeled "Fig. 13.3 Wind vane." This diagram illustrates the components of a wind vane, including an arrow indicating wind direction, cardinal points (N, S, E, W), a pole, and the earth's surface. To the right of the wind vane, there's a diagram of a mercury barometer, labeled "Fig. 13.5 A mercury barometer." This diagram shows a glass tube filled with mercury, with labels for "vacuum," "column of mercury 76 cm," "atmospheric pressure," "mercury," and "container." Further to the right is a diagram of a dry-bulb thermometer, labeled "Fig. 13.6 Hygrometer." This thermometer shows a temperature scale from -20 to 40 degrees Celsius, with the mercury column indicating a temperature above 20 degrees Celsius. There is also text mentioning "Moistened muslim used for wrapping bulb." Below the wind vane diagram is a diagram of a cup anemometer, labeled "Fig. 13.4 Cup Anemometer." This diagram shows three cups mounted on arms, which rotate to measure wind speed. It indicates a "Vertical Pole" and a connection to a "calibrated dial." The bottom section of the image contains numbered text. Section "5. Measurement of Relative Humidity" describes a hygrometer, mentioning its use and construction with wet and dry-bulb thermometers. Section "4. Measurement of Pressure" defines a barometer and discusses atmospheric pressure in terms of millibars and millimeters of mercury. The image is a close-up, slightly angled view of a book page. The lighting is consistent, suggesting an indoor setting. The page is slightly creased and shows some wear, consistent with being from a used book. The background outside the page is dark and out of focus. There is no information in the image that suggests a location in Jalingo, Nigeria.

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FM-66btC3

Jun 30, 2026, 4:08 PM

Jalingo, Nigeria

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