And what other techniques does he use in the Glass Menagerie.

Reality in The Glass Menagerie In The Glass Menagerie, Tennessee Williams uses the roles of the members of the Wingfield family to highlight the controlling theme of illusion versus reality.

This is especially true in the drama The Glass Menagerie.

The similarities between Rose and Laura are the glass menagerie, the unicorn, and blue roses.
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SparkNotes: The Glass Menagerie: Themes

Describing characters' appearances and presenting messages upon the screen, the stage directions foreshadow and emphasize events. The description of Tom standing on the fire escape looking "like a voyager" (692) foreshadows his escape to the Merchant Marines. Also, the description of Laura as "a piece of translucent glass touched by light, given a momentary radiance, not actual, not lasting" (688) foreshadows Laura's brush with self-confidence that leaves as quickly as it comes. Finally, the screen images also foreshadow and emphasize events. For example the screen legend that says "Plans and Provisions" (681) foreshadows Amanda's plan to find her daughter a husband and emphasizes Amanda's sense of duty to protect her family. The screen legend that reads "Annunciation" foreshadows Tom's announcement that he has found a gentleman caller. It also emphasizes, through its biblical allusion, that the coming of the gentleman caller is a very special and long awaited event.

A summary of Themes in Tennessee Williams's The Glass Menagerie

By specifically stating the characters' actions, the stage directions develop the characters more than their dialogue alone. For example, the stage directions describing Amanda's actions and dress exemplify her pretenses and her inability to part with her past. Amanda sits on the fire escape "gracefully and demurely as if she were settling into a swing on a Mississippi veranda" (683). The night the gentleman caller comes, Amanda "wears a girlish frock of yellowed voile with a blue silk sash. She carries a bunch of jonquils--the legend of her youth is nearly revived" (689). Although the stage directions show Amanda's inability to face reality, they leave the audience with a sense of admiration for Amanda and her attempt to protect her family. In the last scene the audience sees Amanda comforting her daughter with "her silliness gone, [having] dignity and tragic beauty" (707). Through her dialogue and the stage directions which describe her actions, Laura is portrayed as fragile, translucent and stagnant, just like her glass collection. The stage directions continuously show how delicate her mind and body are. As Jim and Tom arrive, Laura is incapacitated by fear. According to the stage directions, she "darts through the portieres like a frightened deer" (691). The stage directions tell the audience that "while the incident [Laura's encounter with Jim] is apparently unimportant, it is to Laura the climax of her secret life" (696). This point may never be detected by an audience that is not familiar with the stage directions, yet it is very important to the development of Laura's character because she fails at her one chance to change. A final stage direction important to the development of Laura's character is her returning to the Victrola when Jim leaves. This action indicates that Laura has not changed from her experience with Jim, and she will continue to escape reality through her music and memories.

Williams brilliantly illuminates the idea of isolation through the symbolic use of glass....
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Theatre, Tennessee Williams - Symbolism in the Glass Menagerie

The symbols
deepen the plot and add to the effect
of the Great Depression and its victims.
Abandonment
Notably, In the Glass Menagerie abandonment is
a consistent theme during the play.

Symbols in The Glass Menagerie by Issa Sumar on Prezi


Laura also associates the music with Jim, whom she met through her old high school choir, and she talks about his 'beautiful voice.'
Glass
Scene 5: "She lives in a world of her own-a world of-little glass ornaments..."
The fragile menagerie symbolizes Laura herself because she is both beautiful and fragile, like her glass pieces, Laura "shines" when the light of love or attention is upon her.

Essay on Symbolism in The Glass Menagerie - 1171 …

Tom illustrates this best when he says, "Laura is very different from other girls...she's terribly shy and lives in a world of her own-a world of little glass ornaments, Mother" (47-8, scene 5).