i8S Dr. Hulme's Experiments and Observations 



Exper. 6. But, when mixed with crassamentum that hadbeen 

 kept for some time, and become black and somewhat offensive 

 to the smell, the light seemed to be more quickly extinguished. 



Exper. 7. A singular phenomenon happened several times, 

 on mixing fish-light with putrescent bloody serum. It would 

 not incorporate, but was ejected in globules, like quicksilver 

 when rubbed with any unctuous substance, and afterwards 

 adhered to the side of the vessel in which the mixture was made, 

 in the form of a lucid ring. 



Exper. 8. The luminous matter of a herring was mixed 

 with about two ounces of pure serum, from the healthy subject 

 of the 5th experiment: it soon became finely illuminated, and 

 retained its shining appearance for a long time, whenever it 

 was stirred or agitated. 



Exper. g. The recent serum, drawn from patients afflicted 

 with inflammatory complaints, was illuminated pretty much in 

 the same manner as in the 8th experiment ; and often retained 

 light above 48 hours. 



Urine. 



Exper. 10. Mackerel-light being mixed, by strong agitation, 

 with some fresh urine from a healthy person, a glimpse of light 

 was retained at first, and then was gradually extinguished. But 

 stale and pungent urine, being incorporated with luminous 

 matter, had a still greater extinguishing effect. 



Bile. 



Exper. 1 1 . Some bile, taken from a person who died of a 

 suppression of urine, had herring-light mixed with it, which 

 soon became extinct. Another trial was made, with a different 

 bile, and with the same result. 



