76 
PROCEEDINGS 1839—1840. 
higher state of decomposition of the vegetable matter composing it, 
than was the common coal. The subject required furtlier investiga- 
tion. The workable seams in the townships before-mentioned on the 
Stanley Shale Coal, Stanley Main Coal, Warrenhouse Coal, Lofthouse 
or Haigh Moor Coal, the Fish Coal, the Forty Yards Coal, the Yard 
Coal or Little Coal, and the Main or Deep Coal of the Rotliwell Haigh 
and Middleton Collieries, the Eleven Yards Coal, and the Beeston Coal. 
Of these seams the Forty Yards Coal, the Yard Coal, the Main Coal 
and the Beeston Coal supply Leeds with fuel, both for domestic and for 
manufacturing purposes. The necessity which manufacturers had 
for rendering assistance to this Society was very obvious. The Stanley 
seams occupying the highest position in the district were first 
minutely described, these seams are worked at Hatfield Colliery, 
Auchthorpe Colliery, and the Victoria Colliery, the seams are usually 
17 yards apart ; the upper seams 2ft. Gin. thick, the under one very 
variable, and composed of three or more beds separated by argillaceous 
bands. The next section was at Whitwood, East of Stanley. The 
strata were compared with those at Stanley and the similarity 
fully established ; but there was here another deeper bed. At Wren- 
thorpe the sinking of the shaft was commenced just at the outbreak 
of the Stanley Main Coal, and continued to a depth of 186 yards. 
This shaft passed through the Whitwood Lower Coal, and also the 
Haigh Moor Coal. By the Newmarket section, the Lofthouse Coal 
was proved to be the same as the Haigh Moor ; the lower seam at 
Whitwood, the middle seam at Wrenthorpe, and the Warrenhouse Coal 
at Newmarket were also shown to be identical. The northern outbreak 
of the Lofthouse Coal was traced from Rothwell to Ardsley, and the 
fact insisted upon of the occurrence a few hundred yards beyond that 
outbreak of a peculiar yellowish sandstone rock, commonly called the 
quarrystone. This is called by Dr. Smith the Bradgate Rock, but 
Mr. Thorp has proved that the Bradgate Rock is much deeper. The 
Thornhill Lees or Middleton Rock was given as more distinctive. In 
two sections of strata below the Haigh Moor Coal the author pointed 
out the situation of this rock, and thus fixed its position with regard 
to the old and inferior seams. He likewise compared this section 
with the Middleton section, and assigned the position of the Fish Coal 
