Berzelius Inhales Hydrogen Selenide Gas 1819

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Having discovered the element selenium in 1817, Jöns Jacob Berzelius proceded to investigate its compounds. Hydrogen selenide gas is lethal at concentrations as low as two parts per million - this brilliant Swedish chemist came very close to a nasty end.

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Unrelated to this post, below is an example of

eclectic science esoterica 

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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.