Explanation of the Plates. 435 



PLATES XII.* & XIII. 



Illustrate Mr. Sopwith's Paper on the Application of Isoraetrical Projection to Geologica 

 Plans and Sections. Article XII., page 277. 



PLATE XIV. 



Illustrates Mr. M. Dunn's Notice on die Gravel Bed of St. Lawrence Colliery. Article 



XIII., page 285. 



PLATE XV. 



Illustrates Mr. Buddie's Paper on making the Society a Place for Deposit for Mining 



Kecords. Article XVI., page 309. 



PLATE XVI. 



Illustrates Mr. Buddie's Narrative of the Explosion of Wallsend Colliery, and shows the 

 Situation of the Workings and Mode of Ventilation pursued at the Time. Article 

 XIX., page 346. 



ERRATA. 



Page 312. In second col. at 88 Grey Metal,/or 3 0, read 3 3. 



318. Second line from bottom, for 6 feet, read 5 feet n inches. 



324. Seventh line from bottom,/o»- 1809, read 1810. 



302. Tenth line from bottom, for E Division, read East Division. 



367. Second line from bottom, for E narrow board, read East narrow board. 



In binding the Parts into Volumes, the binder is requested to attend to the following instructions : — 

 Part I. — Cancel the Title and Contents, page 275, and all after, and substitute page 275 given.at the end of 



the present Part. 

 Part II. — Cancel the Title and Contents, and substitute the general Title and Contents given at the end of 



the Part. 



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TRINTED BY T. AND J. HODGSON, UNION STREET. 



