ail Intermitting' Brine Spring, near Kissingen. 315 



notably increased or diminished, there is almost invariably a 

 corresponding change observable in the periods ; these becom- 

 ing shorter as the number of pumps was increased, and vice 

 versa. (4.) I noticed that in the register a period of flow was 

 inserted as continuing on the 1st August from 55 minutes 

 past 7, to 50 minutes past 2, or for 6 hours 55 minutes. Sup- 

 posing that a period of ebb had been omitted, I applied to the 

 superintendent for information, and learned that there was no 

 mistake, but that in consequence of the machinery having been 

 lor some reason stopped for half a day, the flow had continued 

 nearly twice as long as usual. (5.) The following is a synop- 

 sis of the observations. 



2, 3, or 4 Pumps. 5 Pumps. 6 or 7 Pumps. 

 Number of Observations of Flow, 33 53 27 



Of Ebb, 52 68 30 



Time of Flow, . • . 3 h. 20 m. 2 h. 4G m. 2 li. 32 m. 

 ... Ebb, . . . Oh. 21m. li. 19 m. h. 16 m. 



I conceive therefore, that, amidst all the irregularities of the 

 observed times, the general point is pretty clearly made out, 

 that the periods vary inversely with the number of pumps.* 



T was very desirous to watch the spring when wholly disem- 

 barrassed from machinery, and left to itself, and at length on 

 the 24th of August my wish was gratified, and the pumps were 

 stopped. Circumstances prevented my observations being so 

 minute as I wished, but they entirely confirmed what I had 

 previously heard, and found some difficulty in crediting. The 

 pumps having been stopped at 6i p. m. on the 23d, and the 

 spring not thereafter watched until next morning, it ebbed at 

 7 hours 10 min. a. m. ; on the 24th it only recommenced its 

 flow at 9 h. 15 m., or after a period of 2 hours 5 min. in- 

 stead of about 20 min. as usual. The spring was not watched 

 all forenoon, and when I arrived at 1 h. 65 m. it was al- 

 ready low, standing at 11 feet below the brink, and perfectlyf still. 

 Hence it is evident, that the water is actually reabsorbed by the 

 artesian bore which emitted it, for there is no other outlet from 

 the shaft. At 2 h. 4 m. it began to flow very slowly, with 



• It is only fair to state, however, that the observations with three pumpa 

 and those with four being separated, the former were found to give rather 

 smaller periods than the latter. 



