52 



the vertical scale being dependent on the thickness of the sheets 

 of cardboard. 



In the second, the edges are smoothed down and the minor 

 known features of the district, which, occupying less than 33 ft., 

 may escape the contour lines, such as rivers, roads, &c., are 

 inserted by carving. From this any number of plaster casts 

 may be taken. It represents the geographical features only. 

 In the third, a geological map is taken, and the outcrops of the 

 various strata are marked by grooves on the surface, whose 

 inclination and course show the* stratification. These lines 

 have somewhat the aspect of the edges of the contour lines 

 in the first model, but they are not horizontal. In the fourth 

 and final model, the different strata thus indicated are coloured 

 according to their geological age. Five of these colours are 

 shown, but there is no index of their meaning, nor are the 

 names of places given. 



From the second and third of the series any number of casts 

 can be taken, but the fourth has in each case to be coloured 

 by hand. 



163. Model in relief of part of the Alps, including 

 Monte Rosa and the Matterhorn. The scale for the ver- 

 tical and horizontal measurements is the same, viz., 

 o> hence there is no exaggeration of the heights, 

 ize 4 ft. 6 in. by 3 ft. 8 in., under glass shade. By X. 

 Imfeld. 



E. 6. 1887. Published by J. Wurster fy Co., Zurich. 



The bare rocks are coloured in brown, pasture land in light 

 green, trees in dark green, snow fields and glaciers in white, the 

 moraines on the latter by dark lines, the crevasses by cross lines. 

 No names are affixed to any of the features, but the model is 

 accompanied by a book of photographs (see under Photographs), 

 which includes a map with all particulars. The deep valley 

 shown on the north side is the valley of the Visp, in which 

 Zermatt is situated. The range on the eastern side has the 

 Dom at the northern end, the Riinpfischhorn in the centre, and 

 Monte Rosa at the southern. It gives rise to three large glaciers, 

 one to the east and two to the west. The range running east 

 and west across the head of the valley is the Lyskamm range, cul- 

 minating in the sharp wedge-shaped Matterhorn, a little to the 

 west of the valley, with the Dent d'Herens behind it. Four 

 glaciers descend from this portion, one into the Zermatt valley, 

 one south and two north. The range on the western side of the 

 valley commences with the Weisshorn on the north ; behind it is 

 the Roth horn, and nearer the head of the valley is the Dent 

 Blanche. From this two glaciers descend, one with numerous 

 moraines. 



