on the Light emitted from various Bodies, 185 



Exper. 2. A piece of red blotting-paper, about one inch 

 square, and four times doubled, was finely illuminated by 

 matter from a herring, and applied to the upper part of the 

 inside of the thigh. After the expiration of 15 or 20 minutes, it 

 was taken off; and, on examination, the light was quite extin- 

 guished. The experiment was repeated several times, and with 

 the same effect. Another piece of the like paper was illumi- 

 nated at the same time, and placed in the laboratory ; where it 

 retained its light above 48 hours. 



Exper. 3. A piece of shining wood was placed upon the palm 

 of the hand, and inclosed therein for some time ; on inspection, 

 it was found to be more lucid than before. Many trials of 

 this kind were made, with the like success. 



Exper. 4. A dead glow-worm, being but slightly luminous, 

 was breathed upon several times ; and its light increased both 

 in magnitude and brightness. The experiment was frequently 

 repeated, with the same result. 



Animal Fluids. 



Blood. 



Exper. 5. A person having received a contusion, but other- 

 wise in health, was bled. The next day, some herring-light was 

 mixed with about two ounces of the crassamentum or red coa- 

 gulated part of the blood, by stirring them well together with 

 a knife : it caused it to be slightly luminous, but the light was 

 not of long duration. Nearly the same result followed the mix- 

 ture of lucid matter with the recent crassamentum of persons 

 labouring under inflammatory diseases, as the pleurisy and 

 rheumatism. 



MDCCC B b 



