l8oo. of the County of Northumberland. 311 



jeft, the thicknefs and number of workable featn?. of coal muft be 

 first afcerfained ; for which parpofe, we have been favoured with 

 fec^ions exhibiting the thicknefs and depth of the various ftrata, 

 In fome of the dcepeft pits in the county j which will not onlv be 

 dfeful for the prefent purpofe, but we hope will be acceptable to 

 many of our readers who are curious in refearches of fubterra- 

 nean geography. 



At St Anthon's colliery, (three miles eaft of Newcaftle) the 

 different feams are as follow : 



In the above pit or fhaft, which is nearly the deepeft in tKe 

 kingdom, there are no lefs than iixteen feams of cod. But 

 many of thefe^ from their thinntfs, are not work.<<ble. The gth, 

 called the h/gb main coal, and the i6th, the lovi main coal^ are 

 the two pr nctpal feams for affording quantities of coal, being 

 altogether I2| feet thick, and are thofc mnft generally wrought. 

 But the loth, 13th, and I4f-h, are all workable feams, and will 

 afford confiderable quantities of coal j the aggregate of the three 

 making nearly f)-§ leet thick \ fo that the total thicknefs of the 

 workable feams in this colliery amount to 22 feet. 



In Montague Main colliery, (three miles weft of Newcaftle), 

 ;he different feams of coal are as foUoiv : — 



E e 4 I. 



