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Embodying the pedagogical aims of mid-20th-century British education, this dramatic wall chart titled "The Rotating Globe II: One Year – Unequal Day and Night," designed by Pictorial Charts for G.B. Instructional, presents a simplified yet effective visual representation of the Earth's axial tilt and its effects on day and night lengths across the planet throughout the year.

This chart is part of the Geography Series produced by G.B. Instructional Ltd., a London-based company that specialized in creating educational materials in the mid-20th century. The company's offerings included wall charts, films, and other learning aids intended to simplify complex concepts and facilitate a better understanding of geography and other subjects. As such, this chart is both a piece of instructional design history and a reflection of mid-century educational methods.

The chart's design captures the axial tilt of the Earth and its orbit around the Sun across four key dates - March 21, June 21, September 23, and December 22. Each date highlights a particular position of the Earth's axis in relation to the Sun, illustrating variations in daylight length and offering a clear explanation of the phenomenon of unequal day and night. The symbiotic relationship between the chart and the G.B.I. film "Latitude and Longitude" is further evidence of the thoughtfully integrated, multi-modal educational approach of the time.

The impact of the work of G.B. Instructional Ltd., and its contribution to the realm of educational publishing, cannot be overstated. This chart, with its distinctive combination of clarity, precision, and visual appeal, embodies the company's commitment to delivering pedagogically effective materials. Thus, it offers more than a mere depiction of the Earth's rotation and axial tilt—it provides insight into the instructional design philosophies and educational strategies of its time.

Date roughly estimated.