880 SEC. 16. GEOLOGY AND MINING. 



3305. Glass Model of the Anthracite Coal Beds of the 



Wurm basin, near Aix-la-Chapelle. 



United Coal Mining Co., Aix-la-Chapelle (Director Hilt). 



In this model the excessive contortion of the coal measures is shown by 

 15 vertical sections, drawn upon glass plates, to a true scale of ?0 ? 6? of the 

 natural size, horizontal and vertical. 



These sections are taken at intervals of 100 lachteus, about 226 yards, except 

 Nos. 10 and 11, which are at double that distance, as between them there is a 

 great fault which cannot be shown on the scale of the model. 



The 18 workable seams are represented by special colours. The principal 

 seams and the position of the faults are also shown upon a horizontal plane 

 about 230 yards below the surface, which represents the present main level of 

 the deep workings. The depth to the bottom of the basin is about 3,900 feet, 

 and the total amount of coal contained in it is estimated at about 114,000,000 

 tons, or about 285 years' consumption at the present rate of working. 



3306. Transverse Section through the Anthracite Coal 

 Beds of the Wurm basin. Scale, 1 : 1000, 5'28 inches to 1 mile, 

 vertical and horizontal. This is an enlargement of one of tho 

 sections in the Model No. 3305. 



United Coal Mining Co., Aix-la- Chapelle (Director' Hilt]. 



3282. Model of the Altendorf Trough, a double syn- 

 clinal in the " Sonnenschein " seam. 



" Berggewerkschaftskasse" Bochum, Westphalia. 



Shows the stratification of the Flotz, Sonnenschein, and of the Flotz of the 

 fat coal below it in the Altendorf Trough, as well as the (darauf yetriebenc:i 

 Strecken und Abbaue}. By means of Profils made of glass, the (ilberlagernden) 

 parts of the mountains are indicated. 



The ground is removed down to the surface of the seam, upon which are 

 indicated contour lines of equal depths, and the area of the seam worked out. 

 The transverse section of the measures is shown upon the glass plates at the 

 ends of the models. 



3283. Fourteen Models of Faults in the Carboniferous 

 rocks. " Berggewerkschaftskasse" Bochum, Westphalia. 



Typical models for teaching purposes. The blue stripes represent (Strccken*) 

 in the first (Sohle) ; the red ones those in the second ; the green ones those in 

 the third (SoA/e). 



These illustrate the effects produced by dislocations upon the highly in- 

 clined strata of the Westphalian coalfield in 'producing repetition, overlap of 

 seams, &c. 



3415. Typical Plans, for showing the works in coal 

 mines; scale, one thousandth (three chromolithographic sheets, 

 0'60 m by 0-80, with a printed note). 



These plans, which are intended as a model for surveyors, may 

 be used for teaching subterranean topography in technical 

 schools. J. van Scherpenzeel Thini, Liege. 



3416. General Vertical Sections, showing the order of the 

 various Seams of Coal in the Yorkshire coalfield. 



Walter Rowley, C.E. 



