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James Dwight Dana & Danalite from Rockport, Essex County, Massachusetts
mineral photo Rob Lavinsky
"The usual method of observing the polarity of turmaline is to place the heated crystal on a brass support which turns on a pivot like a magnetic needle. By presenting the poles of a magnet it will be found that the north pole of a magnet will attract one extremity of the crystal and repel the other." This is wrong. A magnet has no such effect on electrically charged bodies.
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Unrelated to this post, below is an example of
eclectic science esoterica
by GFCL btr
by GFCL btr
A Manometer
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrupuDJhMNhMM2ZYZbJV1Fx56cSa9HtmlBHvS8vGyDazl7LLAKGzmC4pT5KhVu6rMQPAPjpFYI9TYuMwU0-VY39MH1ZVMf5FgYXRh9ZNAYsepNsmNnc4Td4oGq5pzq6La697uCR_Jd0Lw/s1600/glitchlatest.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLxWqbSOf21b7kL6T9LRR24s33mPgWPiLpxye3PP_t9EG2kKrPmkV1wDdCvQFJRVAgBb5QwqVyzG0YB00j2L19BDbO-bWT1gKDL_R4jAMpTpYqCo0udMcwfJdXt38U2jL0KtCVVNDfrUk/s1600/sales.jpg)
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