In what significant way did the Coca-Cola logo change between its 1890s cursive script and its 1940s version?

The visual identity of brands has evolved dramatically throughout history, with some iconic logos standing the test of time through careful adaptation. Coca-Cola, one of the world's most recognizable brands, has an interesting history of logo evolution that reflects changing design sensibilities while maintaining brand recognition. This trivia question explores how this iconic American brand's visual identity transformed during a pivotal period in advertising history.

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The 'tail' flowing from the final 'a' was completely removed to modernize the logo
The distinctive 'Spencerian script' was replaced with a more geometric sans-serif typeface
The logo remained remarkably consistent with only minor refinements to the flowing script
The original two-color (red and white) scheme was expanded to include blue as a third primary color