ON THE CIRCULATION OF UNDERGROUND TiVATERS. 



83 



Ft. in. 



Dark grey sandstone 



Black sliale . 



Red and grey sandstone 



Black shale 



Shaly sandstone 



Black shale 



Grey sandstone 



Dark grev sandv shale 



Coal '. .' . 



Dark brown fireclay 



Black sand}' shale . 



Dark grey sandy sliale 



White sandstone 



Dark grey sandstone 



Light grey sandstone 



Dark shaly sandstone, coal parting 



Black shale 



Coal 



Dark black shale and prickh' 

 White and grey sandstone 

 Black shale 

 1,600 Fine grey sandstone 



Dark grey sandstone 



Black shale 



Black shale with beds of dark grey sandstone 



Black shale . 



Black shale with beds of gre}' sandstoni 



Coal and shale 



Dark brown fireclay 



Dark grey sandstone 



Dark shaly sandstone 



Yellow sandstone . 



Coarse light grey sandstone 



Hard yellowish sandstone? 



Coarse light grey sandstone 



Coarse grey sandstone . 



Dark grey shaly sandstone 



Black shale 



Dark grey sandy shale . 



Dark blue shale 



Black shale 



Dark brown shale . 



Grey shaly sandstone 



Coarse grey sandstone (coal 



Dark tjrey shaly sandstone 



Yellowish shal}' sandstone 



Dark shaly sandstone 



Black shale 



Grey sandstone with black shale 



Coarse grey sandstone, black joints 

 1,814 Grey sandstone 



The boring was commenced with a diameter of G inches ; at 1,340 feet 

 it was contracted to 4i inches. The 10 feet of red marl and gypsum is the 

 ' rotten marl ' overlying the salt-measures of the district. The first mag- 

 nesian limestone met with contained 4235 per cent, of carbonate of 

 magnesia, and it is proposed to utilise it. At 1,150 feet occurred a brec- 

 ciated limestone, with a strong feeder of saturated brine, the flow of 

 which appears to be well maintained. 



The following is the abstract of the above section : — 



