408 Dr. Hulme's Experiments and Observations 
shining very brightly, was introduced above water, into the same 
air that was used in the last experhnent: it continued very 
luminous at eleven ; but the light was diminished in quantity. 
On the next evening it was found to be extinguished. 
Exper. 7. The same air was employed again at 8 P„ M. with 
a pretty large and thick fragment of wood, uncommonly lucid : 
its light continued vivid and broad at half an hour past eleven. 
The following night, at eight o’clock, the light was still some- 
what extensive and bright. 
Exper. 8. In three other experiments with shining wood, in 
fresh oxygen gas, the light was totally extinguished in the space 
of twenty-four hours. 
Experiments were made, at the same time, and in the same 
manner, with atmospherical air and shining wood ; but it was 
not very evident that the wood shone more vividly in the latter 
air than it did in the oxygen gas. 
Exper. 9. A living glow-worm was put into a two-ounce 
phial, with a glass stopple, containing pure oxygen gas, and kept 
therein for some time. It was then taken out, and exposed to 
the open air ; but no difference, either in the brilliancy or the 
quantity of its light, could be discovered. 
Exper. 10. A luminous dead glow-worm was then inclosed 
in about five ounces of the gas ; but no increase of its shining 
quality could be perceived. 
Exper. 11. At six o’clock P. M. a shining dead glow-worm 
was introduced above water into oxygen gas : it continued 
very lucid therein at 7 P. M. shewing a pure white light. It 
was then taken out, and put above water into atmospherical 
air, where it shone, to all appearance, as splendidly as it did 
when it was in the oxygen gas. 
