Make a wine glass sing

Description: This is a trick to make a ringing sound eminate from a wine glass.

Difficulty: Easy

To make a wine glass produce a faint humming sound, get a wine glass made from real glass.
Get a wine glass and fill it at least half way with wine

Wet your finger with water and put your finger on the top edge of the glass.
Wet your finger and place it on the glass

Start moving your finger in a circle around the glass with a little pressure.
With a little pressure, move your finger around the glass

Result: After circling the glass at least once you should begin to hear a faint singing coming from the glass.

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