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Updated: May 12, 2025
The beautiful comet of 1811 became the object of that celebrated astronomer's conscientious labour. Large telescopes showed him, in the midst of the gazeous head, a rather reddish body of planetary appearance, which bore strong magnifying powers, and showed no sign of phase. Hence Herschel concluded that it was self-luminous.
Priestley, had stated the fatal effects on animal life, of the gazeous oxide of azote; Mr. Davy, on the contrary, for reasons which satisfied himself, thought it respirable in its pure state; at least, that a single inspiration of this gas might neither destroy, nor materially injure the powers of life. He tried one inspiration. No particularly injurious effects followed.
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