4<So On the Light from trganijed Soditi. 



Eneper. 8. The luminous matter of a herring was mixed with about two ouncei 

 of pure ferum, from the healthy fubjefl: of the 5th experiment : it foon became 

 finely illuminated, and retained its fhining appearance for a long time, whenever it was 

 ftirred or agitated. 



Exper. 9. The recent ferum, drawn from patients afflicted with inflammatory com- 

 plaints, was illuminated pretty much in the fame manner as in the 8th experiment ; 

 and often retained light above 48 hours. 



Urine. 



Exper. 10. Mackerel-light being mixed, by ftrong agitation, with fome frefli urine 

 fiom a healthy perfon, a glimpfe of light was retained at firft, and then was gradually 

 cxtinguifhed. But ftale and pungent urine, being incorporated with luminous matter, 

 had ftill greater extinguHhing efiisft. 



Bile. 



Exper. 1 1. Some bile, taken from a perfon who died of a fuppreflion of urine, had 

 herring-light mixed with it, which foon became extindl. Another trial was made, with a 

 different bile, and with the fame refult. 



Milk. 



Exper. 12. Human milk not being eafily obtained, fome mackerel- light was in- 

 corporated, by agitation, with two ounces of frefli cow's milk, which was thereby 

 rendered finely luminous, and continued fliining above 24 hours. Frefli cream alfo re- 

 tained fome light j though it was not fo vifible as with milk, owing probably to its 

 thicknefs. But, when either milk or cream turn four, they contraft a very extinguifliing 

 property. A quart of milk was kept five days, in a moderately cool place, in the month 

 of June } by that time, it was changed into a mixture fomewhat refembling curds and 

 whey, that is, into a fmall fmooth coagulated part, and a very thin one, both which 

 were acidulous. Some fine mackerel-light was mixed with two ounces of each of them, 

 in feparate phials, and they extinguiOied it immediately. 



V, Obfervatians 



