

i66 Dr. Hulme's Experiments and Observations 



permanent for some Time. It seems to be incorporated with their 

 •whole Substance, and to make a Part thereof, in the same 

 Manner as any other constituent Principle. 



EXPERIMENTS. 



The Flesh of Herring* 



Exper. 1. A fresh herring was split, or divided longitudinally, 

 by a knife, into two parts. Then, about four drams of it, being 

 cut across, were put into a solution, composed of two drams of 

 Epsom salt or vitriolated magnesia, and two ounces of cold 

 spring water drawn up by the pump. The liquid was contained 

 in a wide-mouthed three-ounce phial, which was placed in the 

 laboratory. Upon carefully examining the liquid, on the second 

 evening after the process was begun, I could plainly perceive a 

 lucid ring (for the phial was round) floating at the top of the 

 liquid, the part below it being dark; but, on shaking the phial, 

 the whole at once became beautifully luminous, and continued 

 in that state. On the third evening, tfie light had again risen to 

 the top; but the lucid ring appeared less vivid, and, on shaking 

 the phial as before, the liquid was not so luminous as on the 

 preceding night. 



Exper. 2. The same experiment was repeated. On the second 

 night, the liquid, being agitated, was very luminous; on the third, 

 not so lucid ; and on the fourth the light was extinguished. 



Exper. 3. With sea salt or muriated natron half a dram, and 

 two ounces of water. On the second night, the liquid, when 

 agitated, was dark; on the third, lucid; on the fourth, very lumi- 

 nous ; on the fifth, it began to lose light ; on the sixth, it con- 



• The quantity used in each experiment was about four drams, 



