222 Dr. Marcet on an Mumuiotis Chalybeate Spring. 



2. I have stated before (§ II. d.) that some difference prevailed 

 m the specific gravity of the several specimens of the water which 

 were examined. A similar want of uniformity was observed in 

 regard to the quantity of solid ingredients, as will appear from the 

 following statement :* 



GRAINS. 



The 1st specimen yielded 86. 



2d 



3d 



4th 



5th 



6th 



7th 



8th 



92. 



63.6 



80.4 



82.8 



77.2 



84. t 



78. 



^ In the pint of 

 sixteen ounces. 



644 



Tliese eight results therefore give 80,5 grs. dried at 180% as the 

 average quantity of solid ingredients in each pint of the water. 



* In the first of these trials, a whole pint was evaporateil ; but in the subsequent ones, 

 the quantity of water was diminished to eight, six, and sometimes only four ounces, all 

 of which, for the sake of uniformity, I have reduced in the table to the common 

 standard of the pint. 



+ This specimen I brought myself from the spring; the others were sent me in sealed 

 bottlca from the Isle of Wight. 



