71 
At Boxwell withy bed on the 15th July the air temperature 
was 67° Faht., the spring temperature was 52° Faht., and the 
temperature of the water at the Hatch 55° Faht. 
A trace of the long underground passage of these springs, 
as compared with the Seven Springs (at the source of the 
Churn) being indicated by 50 per cent. increased dissolved solid 
impurity, and similar increased hardness. 
The Plan and Section that accompany these remarks are 
based on the published Ordnance Geological Maps, which appear 
to be correct as regards stratigraphic representation, &c., in 
the neighbourhood of the springs. No doubt they are developed 
by the fault, the line of which is indicated. 
The efflux level in the withy bed is 284 ft. on Ordnance 
datum. At the canal above, into which some less copious 
springs languidly flow, it is 10 ft. higher. 
Formerly the canal pond was larger than at present, as 
indicated by the faint blue colouring, and the water level in the 
canal was two feet higher, but it was found advantageous to 
lower it, which was done by: the establishment of the “little 
lock.” 
The land overflowed by. the Springs was reclaimed, and 
beyond the limits of the existing pound sold. 
The mean efflux level of the Boxwell springs is 40 ft. above 
that of the Chalford springs, and about the same depth below 
that of the Kemble and Thames Head springs. 
The former are 103 miles off west by north, and the latter 
4} miles off west by north in a direct, or, as Americanized, 
“qr” line. 
