upper Strata of the South-east Part of England. 65 



apparatus. A is s. common air-tight ^io\Q^) a, a flexible hose 

 bringing the fire-damp from its lodgement to the source of heat; 

 lb two metallic canals, one on either side, that opposite to the 

 hose supplying atmospheric air as a pabulum for the combustion. 

 This air is not suffered to mingle with the fire-damp below the 

 bars of the grate, consequently explosion will not take place ; and 

 it will not burn at the orifice of the metallic canal, there being 

 no oxygenous medium to support it ; cc are two dampers which 

 may be shut when the door of the stove is opened to admit a fresh 

 supply of fuel; d is an air-tight drawer to receive the ashes. — It 

 may be unnecessary to be more explanatory. 

 I am, with high respect, sir, 



Your obliged and very humble servant, 

 London, Jan. 21, 1817. J. MuRRAY. 



rio'2 



Fio-1. 



XV. On the Order of the Upper Strata of the South-east Part 

 of England. Deduced from a Series of Observations made 

 for Sir Henry Englefield, in theYears 1811,-12,0^^-13, 

 ^y Thomas Webster, Esq. M. G. Sf. 



Alluvium. The ruins or detritus of regular strata, formed 

 either by the present existing causes, or by some extraordinary 



* Placed under the upcast shaft. 



t From Sir Henry C. Englefield's superb work, a " Description of the 

 jMrincipal picturcsaue Beauties, Anii.juities, and Geological rhsnomenaot 

 the Isle of Wiijlit.'' 1816. 



Vol. 49. No. 225. Jan, 1817. E «"<* 



