 | Erasmus Darwin - 1798 - 472 σελίδες
...electric analogy; and adds, that the tails of comets coniift of a lucid felf-ftiining fubftance, which has not the power of refracting or reflecting the rays of light. Efiays. The tail of the comet of 1744, at one time appeared to extend above 16 degrees from its body,... | |
 | Olinthus Gilbert Gregory - 1802 - 590 σελίδες
...the tail ; therefore, fiuce bodies reflect and refract light by one and the same power, he concludes that the matter of a comet's tail has not the power of refracting or reflecting light, and is, of consequence, a lucid or self shining substance. Also, from what astronomers say of... | |
 | John Mason Good - 1819 - 694 σελίδες
...against the Newtonian hypothesis ; and concludes that the tail of a comet is formed of matter which has not the power of refracting or reflecting the rays of light ; hut that it is a lucid or selfshining substance: and from its similarity to the aurora borealis,... | |
 | 1823 - 894 σελίδες
...colours ; and consequently I infer, that the rays of light suffer no refraction in passing through a comet's tail. And thence I conclude (as before),...of refracting or reflecting the rays of light, and must therefore be a lucid or self-shining substance." ¿16 But whatever probability the Doctor's conjecture... | |
 | Miscellaneous extracts - 1839 - 390 σελίδες
...electric analogy, and adds, that the tails of 59 comets consist of a lucid self-shining substance, which has not the power of refracting or reflecting the rays of light. — (Essays.) The tail of the comet of 1744 at one time appeared to extend above 16 degrees from its... | |
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... comets consist of a lucid self-shining substance, which has not the power of refracting or reflecting the rays of light. — (Essays.) The tail of the comet of 1744 at one time appeared to extend above 16 degrees from its body, and must have thence... 