Alteration of the Human Voice by Hydrogen

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"I have performed the experiment several times with hydrogen prepared by means of commercial zinc, and with no unpleasant effect"  The author's blasé statement hides the fact that this experiment has proven lethal 

For more on the potential danger from this experiment, see here

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Unrelated to this post, below is an example of

eclectic science esoterica 

Johan Kjeldahl

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WARNING - Many subjects outlined within this site are extremely dangerous and are provided here for information only. Please don`t experiment with high voltages or chemicals unless you are fully conversant with safe laboratory practices. No liability will be accepted for death, injury or damage arising from experimentation using any information or materials supplied.