1818.] Fount ainhall Chalybeate Spring. 101 



Oct. 7, M, R, 194. pints. B, 30-00.— A, 20 pints. B, 2994. 



8, M, R, 20 pints. B, 29- 9.— A, 20 pints. B, 29-86. 



9, M, R, 18 pints. B, 29-81.— A, 18 pints. B, 29-75. 



10, M, R, 19£ pints. B, 29-70.— A, 19£ pints. B, 29-70. Rain and east 



wind. 



11, M, R, 14^ pints. B, 29-77.— A, 14i pints. B, 2980. 



13, M, R, 12 pints. B, 29-96.— A, \S\ pints. B, 29-98. 



14, M, R, 15 pints. B, 29-97.— A, 15 pints. B, 29-94. 



15, M, R, 19i pints. B, 2984. Some rain.— A, 15 pints. B, 29-80. 



Frequent drizzling showers. 



16, M, R, 13§ pints. B, 2983.— A, 13| pints. B, 29-S6. A good deal 



of rain and some bail since last night. 



17, M, R, 11 pints. B, 29-91.— A, 11 pints. B, 29-91. 



18, M, R, 16^ pints. B, 29-84. Rain.— A, 19 pints. B, 29-80. Fre- 



quent and heavy showers of rain. 



20, M, R, 19 pints. B, 29-79.— A, 15£ pints. B, 29 78. 



21, M, R, 18£ pints. B, 29 65.— A, 20 pints. B, 29-50. 



22, M, R, 6^ pints. B, 29'47.— A, 13 pints. B, 2958. 



23, M, R, 6 pints. B, 29-72.— A, 9 pints. B, 2978. 



24, M, R, 11| pints. B, 29-72.— A, 14 pints. B, 29-67. 



25, M, R, 17 pints. B, 29-49.— A, 21 £ pints. B, 29-38. Brisk S. W. 



wind. 



27, M, R, 20 pints. B, 29-18.— A, 30 pints. B, 2898. A high S. W. 



wind, with heavy showers of rain. 



28, M, R, 23 pints. B, 29-00.— A, 21 pints. B, 2901. Showers of rain 



and sleet. 



29, M, R, 17 piqts. B, 29-01.— A, 14$ pints. B, 29-05. 



30, M, R, 32 pints. B, 28-80. A high west wind, and heavy showers at 



intervals. — A, 32 pints. B, 28-80. Flashes of lightning seen last 

 night. Storm of wind still unabated. 



31, M, R, 14 pints. B, 28-90. A great fall of rain last night, and storm 



of wind abated. — A, 4 pints. B, 2900. A severe blast of hail, 

 snow, and sleet, with a furious N. W. wind. 



Enough of evidence appears in the foregoing* register fully to 

 corroborate the idea that the differences in the atmospherical 

 pressure produce the minor and more delicate changes upon the 

 basin of the well. Innumerable proofs of this will be noticed ; 

 and the averages of the two extremes are remarkably convincing 

 when opposed to one another. 



The highest extreme is 48 pints. B, 29-39 in. The lowest 

 extreme, is 13 in. down. B, 29*86 in.; making a difference 

 between the two of no less than ^_l. of an inch in the state of 

 the mercurial column. But it is evident that the continued 

 increase or diminution of the quantity of water upon what may 

 be termed the great or ruder scale, is to be ascribed to some of 

 those causes which have been enumerated in my former notices 

 on this subject. 



As the register of the alternations of the spring, contrasted 

 with the barometer, has been now kept for 19 months, it becomes 

 unnecessary to continue it longer ; 1 shall not, therefore, trouble 

 you again with it, but am, .Sir, your obedient servant, 



Thomas Lauder Dick. 



