76 Dr Paterson on the Temperature of 



From the above table it will be observed that, after passing 

 through a very great thickness of Carse alluvium and clay, the 

 boring machine entered the usual rocks of the coal-formation ; 

 and that the water sprung to the surface immediately upon en- 

 tering the dark grey sandstone, and rapidly increased as they 

 descended in this stratum. 



This perforation was made in the year 1827, from Avhich 

 time till the present the spring has continued to aiford an un- 

 diminished supply of excellent water. The temperature of it, 

 however, had not been ascertained previous to the year 1836, 

 when it was found to be 51^° ; and from that time till the 

 month of January 1839 it has been frequently examined, and 

 its temperature found, by the same thermometer, to be precise- 

 ly similar. It may be here remarked of this spring, that it 

 occurred to us there might be a certain loss of tempera- 

 ture to the spring in its passage through such an extent of al- 

 luvial matter, and this idea was further strcng-thened by the 

 fact, that the water was brought from a little below the rock 

 head, by means of iron pipes, instead of wooden ones which 

 are usually employed. To solve such doubts, the instrument 

 formerly described was lowered down ; unfortunately it did 

 not reach above 100 feet, in consequence of some impediment 

 to its descent ; but certainly at that depth, the water brought 

 up had as high a temperature as that coming from the mouth 

 of the bore itself. 



INIumrills, the property of Mrs Walker, is situated on the 

 edge of the Carse of Falkirk, and slightly elevated above it. 

 In this estate a bore for ascertaining the presence of coal- 

 strata was sunk in the year 1837. In the journal of this per- 

 foration, which has been obUgingly communicated to me by 

 Miss Walker, but which is too long for insertion here, the 

 quantity of alluvial matter passed through was small, 23 feet 

 i inches, and the Avater is brought up from the rock-head by 

 means of a strong wooden tube. The water, it appears, never 

 came over the ec'ge of the bore, until they got among some 

 thick strata of sandstone, at the termination of the bore, Avhich 

 i s 213 feet deep. The temperature of the water of this spring 

 lias been frequently ascertained, from a short while after the 

 borers ceased their operations to the month of January last, 



