the Water of Kilburn Wells. 121 
efficacy. A small plate of silver was placed under the arm, in 
contact with the skin, and thus worn for some hours without 
being tarnished by the perspirable matter ; a bottle of the Kil- 
burn water having now been drank, in less than half an hour 
the silver was become black. 
One ounce of fresh gall was mixed with a quart of the water 
as it came from the spring, and into another bottle was put 
the same quantity of gall, with a quart of distilled water, and 
both were placed in a warmth of g 6 °. After ten hours, the latter 
mixture began to show signs of putrefaction, while that with 
the Kilburn water continued perfectly sweet. Twelve hours 
after, this also became putrid. 
Two ounces of very putrid gall were mixed with a quart of 
Kilburn w r ater, and placed in the same warmth. The foetor 
was soon diminished, and after three hours no longer percep- 
tible. 
Two ounces of putrid gall were mixed with two ounces of 
distilled water, in which 24 grains of the saline mass, obtained 
by evaporation from the Kilburn water, had been previously 
dissolved ; and this mixture was likewise placed in a warmth 
equal to g 6 °. After 2± hours the offensive smell had gone 
completely off. 
Similar experiments were made with blood, and the results 
were the same. 
Experiments to ascertain the Properties and Proportion of the 
Elastic Fluids, contained in the Kilburn Water. 
Th& apparatus with which these experiments were instituted 
, contained 16 cubic inches : the cylinder for the reception of 
the extracted air, eight cubic inches. Into the jar were put 14 
MDCCXCII, R 
