Mr. M. Dunn on the Sinking of Preston Grange Engine Pit. 227 



one or other of their premiums, and have received from the Secretary 

 following Testimonials : — 



SOCIETY OF ARTS. 



Edinburgh, Feb. 17, 1831. 

 Sir, 



The Report of the Committee on your Cast-Iron Tubbing, was given in, and 

 read last night. The Report was approved of, and I was instructed to transmit a copy of 

 it to you, which I annex ; and am 



Sir, 



Your most obedient Servant, 



JAMES TOD, Secretary. 

 Matthias Dunn, Esq., Preston Grange, Tranent. 



Copy of a Report on Mr. Dunn's Cast Iron Tubbing. By Messrs. Stevenson, Grieve 



and Bald. 



Read, February 16, 1831. 



Edinburgh, December 20, 1830. 

 I have examined the Drawing, and read the Description of Cast Iron Tubbing, used at 

 Preston Grange Pit, by Matthias Dunn, Esq., and having been down the Engine Pit, I 

 found it executed in a very complete and business-like style, and quite effectual in keeping 

 back the water, and preventing it descending the shaft. And so far as I know, this kind of 

 Segment Cast Iron Tubbing has never been applied in any colliery in Scotland, until in this 

 instance, although it is much practised at Newcastle. 



(Signed) ROBT. BALD. 



Midfield, Dec. 25, 1831. 



I have turned my attention to the method of keeping back water in the pits at Newcastle- 

 upon-Tyne, and find the Cribbing and Cast Iron Segment Tubs, used by Matthias Dunn, 

 Esq., at his sinking on Preston Grange Estate, to be done in the same substantial manner ; 

 and do not know of any tubbing being put in, in so secure a manner, as yet, in any of the 

 pits in Scotland. 



(Signed) GEORGE GRIEVE. 



Chambers, 84, George Street, Jan. 13, 1831. 

 I have perused the accompanying Description by Mr. Dunn, and examined the Drawing 

 of his method of tubbing or lining the shaft of the mine he is sinking at Preston Grange ; 

 having also seen something of the operation on the spot, and read the Reports by Messrs- 



