810 Professor Forbes's Account of 



This spring was first bored for between 1785 and 1788, 

 when the present shaft was sunk. It has a diameter of 8 feet 

 for a depth of 13 feet 9 inches (all Bavarian measure, 1 

 foot = .95756 feet English), and to a farther depth of 11 feet 



3 inches, it is only 5 feet diameter. Its cubic content is 9^0 

 feet. From the bottom of the shaft a bore-hole was carried 

 down to a farther depth of 68 feet, or 93 feet from the brink 

 of the shaft. It yielded at first 4 cubic feet at 3.14 per cent, 

 of salt, but continually diminished, so that in 1798 there was 

 but 1 cubic foot per minute, at 9, per cent., and in 18] 0, it 



.ceased to be taken into account in supplying the manufactory. 



The Bavarian Government having taken the manufacture 



into their own hands (formerly it was farmed), a fresh bore 



was resolved to be made, and commenced June 17. 1822. The 



existing bore was cleared and carried down with a diameter of 



4 inches. The following is an extract from the original journals 

 of the work, which I translate literally, and which is of great 

 importance to the theory of the phenomena. 



Date. 



Depth. 



Rock. 



REMARKS. 



1822. 

 June 17. 



Bavarian 

 Ft. in. 



93 



21. 



26. 

 27. 



103 8 



July 12. 



140 71 



Bunter saudstein 



Uncommonly 

 hard sandstone 



Softer, with loamy 

 strata interposed 



Bunter sandstein 



Work commenced. The rock 

 consists of reddish, yellowish, 

 and also white sandstone, in 

 strata from 15 to 24 in. thick; 

 then of soft, clayey, and some- 

 what micaceous rock, some 

 inches thick, imbedded in the 

 harder sandstone. 



On the morning of the 26th, an 

 overflow of water was observed, 

 which had so increased on the 

 morning of the 27th, that the 

 flow amounted to 4 cubic feet, 

 with 3 per cent, of salt, and a 

 TEMP. OF 15° Reaumur. The 

 neighbouring Reiclie Brunnen 

 (25 to 30 feet distant), yielded 

 its usual quantity and quality 

 of brine. 



Since the 26th June, the flow has 

 increased to 8 cubic feet. The 

 strength 2| per cent. 



