ANALYSIS OF A MINERAL WATER, 



Oct. 27, 1808, sp. gr. as 1013*5 to 1000. 



Dec. 2, 1808, two portions of the mineral water wfre 

 gent to me, one of which was taken from about the middle 

 of the well, the other from the bottom, 



Sp. gr. of the water from the bottom 1013-5. 



Sp. gr. of the water from the middle 1012. 



Foreign water T n consequence of some freshwater springs beimr found 

 wa» excluded. . . 



to discharge themselves into the well, it has lately been 



emptied and walled round as above stated; and it is proba- 

 ble that hereafter the strength of the water will be more 

 regular. 



It seems, that the workmen experienced a great deal of 

 Action of the difficulty, in securing the dam. At riivt, they built the 

 yrater upon fom. with common lime mortar, the action of the water de- 

 stroyed its cementing power. Then a fresh wall was built, 

 with a gray lime, which the neighbourhood affords, and 

 which sets very firm underwater; but this also, as might 

 be expected, failed, from the action of the water on the 

 lime. At length the dara was formed by setting bricks in 

 a strong clay, that is free from lime or nearly so, and it 

 seems to answer the purpose intended. 

 Examination The mineral water that was subjected to the following 

 from thebot- experiments was taken from the bottom of the well, by 

 torn of the will, sinking empty bottles provided with valves, as soon as the 

 bottles were drawn up, they were carefully corked, and tied 

 down with bladder. , 



Its appearance. 1. A glass buttle full of this water was perfectly transpa- 

 rent, and without sediment while uncorked. After standing 

 for some time in the laboratory, where the thermometer 

 stood at 40°, the cork was drawn, a small portion of gas 

 compressed in the neck of the bottle escaped, but no bub- 

 bles of air were seen to escape or even to form for some 

 minutes after. At length however the water became turbid, 

 and gradually deposited an ochrey sediment. 

 Tested with o. a . Pure distilled water was tinctured with a certain 



«bba"c-° f ^ P ro P ort ' on of tincture of red cabbage, and placed as a 

 standard of the colour. 



b. An equal quantity of the tincture of cabbage was 

 added to a corresponding portion of the mineral water, 

 which was quite fresh. At first it became slightly reddened, 



but 



