 In the case of an ordinary gaslight the best experiments show that not more than one or two per cent of the radiant energy consists of visible rays, the rest is either invisible heat or actinism ; that is to say, over ninetyeight per cent of the gas is...  Scientific Opinion - Page 1051870Full view - About this book
 | Martha Doan - 1902 - 680 pages
...artificial methods of illumination. In the case of an ordinary gas light, experiments show that at most, one per cent of the radiant energy consists of visible rays, the rest being invisible heat ; that is to say, over ninety-nine per cent of the gas is wasted in producing... | |
 | 1896 - 658 pages
...ßrc-fly is wasted. It is quite different with our artificial methods of illumination. In the case of an ordinary gaslight the best experiments show...rest is either invisible heat or actinism ; that is iu say, over ninetyeight per cent of the gas is wasted in producing rays that do not help in making... | |
 | Royal Entomological Society of London - 1870 - 668 pages
...is wasted. It is quite different with our artificial light. In an ordinary gas-light, it is proved that not more than one or two per cent, of the radiant...rays, the rest is either invisible heat or actinism ; in other words, more than ninety-eight per cent, of the gas is wasted in producing rays that do not... | |
 | 1890 - 600 pages
...artificial methods of illumination. In the case of an ordinaiy gas-light, experiments show that at most one per cent, of the radiant energy consists of visible rays, the rest being invisible heat ; that is to say, over ninety-nine per cent, of the gas is wasted in producing... | |
 | 1890 - 556 pages
...artificial methods of illumination. In the case of an ordinary gas-light, experiments show that at most one per cent, of the radiant energy consists of visible rays, the rest being invisible heat ; that is to say, over ninety-nine per cent, of the gas is wasted in producing... | |
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