Millions of eye patients have been asked to read the passage from Franklin's autobiography, "I walked up Market Street, etc." which is commonly printed on eye-test cards. Here's your chance to do it.
Armonica, Momentarily Mesmerizing
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| Ben Franklin's Glass Armonica |
Everyone knows Ben Franklin spent a lot of time holding a wine glass. Evidently, he noticed a musical note emerges if you run your finger around the open mouth of the drinking glass, and systematically studied how the tone can be varied by varying the level of liquid in the glass. The same variation in emitted tone relates to variations in thickness of the glass. So, he set up a series of different sized glasses impaled on a horizontal broomstick, enough to cover three octaves, rotated the broomstick with a treadle like those used for spinning wheels -- and made music. The tone has a haunting penetration to it, which induced both Beethoven and Mozart to write special compositions for the armonica, and the Eighteenth Century went wild with enthusiasm.
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| Glass Armonica |
Unfortunately, a number of the young ladies who played the armonica went mad. We now recognize that since the finest crystal glass was used, with a very high lead content, the mad ladies were suffering from lead poisoning after repeatedly wetting their fingers on their tongues. As a matter of fact, port wine at that time was stored in lead-lined casks, resulting in the same unfortunate consequences, which included stirring up attacks of gout. Franklin himself was a famous sufferer from gout, which was more likely related to the port wine than playing the armonica, in his particular case.
Anyway, the reputation for inducing madness added to the spooky sort of sound the instrument made, attracting the attention of a montebank named Franz Anton Mesmer, who falsely claimed to be the the father of hypnotism. Mesmer enhanced the notiety of his stage performances by hypnotizing subjects while an assistant played the armonica, meanwhile relating all sorts of wild tales about animal magnetism. This was pretty sensational at the time, until a young man in an audience suddenly died. It is now speculated that the victim probably had an epileptic seizure, but the news of this public fatal event pretty well finished Mesmer as an evangelist, and the armonica as a musical instument.
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| Franklin Court |
There's a replica of an armonica on display in the Franklin Court Museum around 3rd and Chestnut, which we are vigorously assured is not made with leaded crystal glass. The Park Rangers put on two daily performances by request, at noon, and 2:30 PM.
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