 | 1877 - 588 pages
...experiments show how conveniently and accuately this instrument can be used as a photometer. By jalancing a standard candle on one side against any source of...latter in terms of a candle is readily shown ; thus, ¡n the last :xperiment the standard candle 48 inches off is balanced эу a gas-flame 113 inches off.... | |
 | James Samuelson, William Crookes - 1876 - 606 pages
...in opposite directions, and the luminous index remains at zero. When, however, I cut one candle off, the candle on the opposite side exerts its full influence,...off. The lights are therefore in the proportion of 12* to 28% or as 1 to 5'4. The gas-burner is therefore equal to about 5^ candles. In practical work... | |
 | 1876 - 802 pages
...index does not move. I will retain one candle 12 inches off, and put two candles on the other side 1 7 inches off. On removing the screens you see the index...off. The lights are, therefore, in the proportion of 12* to 28', or as 1 to 5.4. The gas-burner is, therefore, equal to about five and a half candles. In... | |
 | 1876 - 808 pages
...small gas-burner here, which I place 28 inches off on one side, and you see it balances the caudle 12 inches off. These experiments show how conveniently...off. The lights are, therefore, in the proportion of 12* to 28', or as 1 to 5.4. The gas-burner is, therefore, equal to about five and a half candles. In... | |
 | Royal Society (Great Britain) - 1876 - 810 pages
...behind solution of sulphate of copper . . 6 „ „ „ alum plate 14 „ A small gas-burner 113 „ These experiments show how conveniently and accurately...; thus in the last experiment the standard candle 48 inches off was balanced by a gas-flame 113 inches off. The lights were therefore in the proportion... | |
 | Royal Society (Great Britain) - 1876 - 818 pages
...behind solution of sulphate of copper . . 6 „ „ „ alum plate 14 „ A small gas-burner 113 „ These experiments show how conveniently and accurately...on the other, the value of the latter in terms of a caudle is readily shown ; thus in the last experiment the standard candle 48 inches off was balanced... | |
 | Radiometer - 1876 - 56 pages
...scale. Cut the other one off and obscure the first, and the spot of light flies to the other side. By balancing a standard candle on one side against...the latter in terms of a candle is readily shown. In practical Work on photometry it is often required to ascertain the value of gas. Gas is spoken of... | |
 | 1877 - 624 pages
...„ i candle, behind alum plate 5 millims. thick 14 ,, A small gas-flame (bat's-wing) .. 113 „ 140. These experiments show how conveniently and accurately...thus, in the last experiment, the standard candle 48 inches off was balanced by a small gas-flame 113 inches off. The lights were therefore in the proportion... | |
 | 1877 - 608 pages
...heat can be balanced on one side against light and colour on the other side (109, no). 140. T..ese experiments show how conveniently and accurately this...thus, in the last experiment, the standard candle 48 inches off was balanced by a small gas-flame 113 inches off. The lights were therefore in the proportion... | |
 | Neil Arnott - 1877 - 916 pages
...accurate measurement. A candle on each side of the apparatus keeps the index ray of light at zero. By balancing a standard candle on one side against...the latter, in terms of a candle, is readily shown. 800. The real darkness of a shadow, depends much on the extent and nature of the light-reflecting surfaces... | |
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Twice 144 is 288. The light of these candles, therefore, is as 288 to 289. They therefore balance each other as nearly as possible. Similarly I can balance a gaslight against a candle. I have a small gas-burner here, which I place 28 inches off on one... 
