63 



200. Topographical map of London and its environs, 

 coloured geologically, by .R. W. Mylne, C.E., F.R.S.. 

 1851. Scale, 1*43 inches to the mile. 100 square miles. 



1876. Lent by the late E. W. Mylne, F.R.8. 



201. Geological map of London and its environs, by 

 R. W. Mylne, F.R.S., 1871, 159 square miles. Scale, 

 1*43 in. to the mile. 



1876. Lent by the late R. W. Mylne, F.R.S. 



The same map as No. 200, but noxv more complete. The 

 heights are indicated by roughly drawn broken contour lines. 

 Below the map is a geological section from Hendon to East 

 Wickham, on the same horizontal scale, but with a vertical scale 

 of 500 feet to 1 inch. 



202. London and its environs, topographical and 

 geological. 131 square miles. Scale, TT -J ^%, or 3'72 inches 

 to the mile, with English and French geological references, 

 by R. W. Mylne, F.R.S., 1855. 



1876. Lent by the late R. W. Mylne, F.R.S. 



This consists of nine sheets of Wyld's map of London. The 

 levels are marked with contour lines at distances of 10 feet, and 

 the hills are also shaded. There are two descriptive indices, one 

 in English, the other in French. Varnished and mounted in 

 frame, 



203. Map of the geology and contours of London and 

 its environs. Plain, and coloured geologically. 176 

 Square miles, Scale* -rrir^* or 3*72 inches to the mile. 

 By R. W. Mylne, F.R.S., 1856. 



1876. Lent by the late R. W. Mylne, F.R.S. 



204. Geological map of the tertiary and cretaceous 

 districts of England, and the north of France, Belgium, 

 Holland, Denmark, the coalfield areas, and contoured 

 depths of the adjacent seas, by Robert W. Mylne, F.R.S., 

 1862. Scale, ^-o-oVw or 7'891 miles to the inch. 



1876. Lent by the late R. W. Mylne, F.R.S. 



Compiled from the maps of Messrs. Duf reynoy and filie de 

 Beaumont, Dumont, Bach, the British and French Ordnance and 

 Geological Surveys, and Admiralty charts, Greenough, Godwin 

 Austen, Prestwich, Murray, &c. The marine contour lines repre- 

 sent each additional depth of 10 fathoms, and at various places 

 the depths in feet are indicated thus (167). The figures on the 

 land represent altitudes above the sea level. The colours given 



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