152 PHILOSOPHICAL TRANSACTIONS. [aNNO ]7Q2. 



tarnished by the perspirable matter ; a bottle of the Kilburn water having now 

 been drank, in less than -i- 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 96". After 10 

 hours the latter mixture began to show signs of putrefiiction, while that with the 

 Kilburn water continued perfectly sweet. Twelve hours after, this also became 

 putrid. — Two oz. of very putrid gall were mixed with a quart of Kilburn water, 

 and placed in the same warmth. The foetor was soon diminished, and after 3 

 hours no longer perceptible. — Two oz. of putrid gall were mixed with 2 oz. of 

 distilled water, in which 24 grs. 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 96^. After 2-J- 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. — The apparatus with which these experiments 

 were instituted, contained 16 cubic inches : the cylinder for the reception of the 

 extracted air, 8 cubic inches. Into the jar were put 14 cubic inches of the fresh 

 drawn water ; and having been immediately connected with the apparatus, it was 

 placed in a lamp furnace. The heat having been gradually increased till the 

 water began to boil, 6 cubic inches of the quicksilver, with which the cylinder 

 had been previously filled, were displaced by the air which came over. This 

 vessel having been artificially cooled to 53°, the air was contracted ^ of an inch. 

 Now, if the 2 cubic inches of atmospheric air, left in the jar, be deducted, there 

 remain 34 cubic inches of air expelled from 14 inches of the water. By agitation 

 in lime-water 2^ cubic inches were absorbed, the precipitated aerated lime 

 weighed 2-i- grs. The remaining gas was found to be hepatic air. 



Experiments to ascertain the fixed constituent parts of the Kilburn Water, and 

 their properties. — Exper. 1. Twenty-ft)ur pounds of vvnter (at 1(5 oz.) were eva- 

 porated in one of the Wedgwood basins, by a gentle heat, down to 4 oz. ; this 

 residuum was then reduced to perfect dryness in a small glass vessel. The mass 

 thus obtained was scaly, with crystals intermixed, and of a yellowish hue ; its 

 taste was bitter, and but little sliarp ; the weight I9OO-I-I-2- grs. (which were equal 

 to 1560 grs. of the further used accurate weight), which divided by 2-1, gives for 

 every pound of the water 79 grs. of solid matter. The basin in which the lirst 

 evaporation had been made, was rinced with a little aqua regia, that such earthy 

 panicles as might have adhered to it sliould not be lost ; this solution was put 

 aside and marked a. 



