460 



W. Toplei/ — European Geological Survei/s. 



1-incli Ordnance maps (1 : 63,360). In the North of England the 

 6-inch maps (1 : 10,560) have been used and much of the ground, 

 has been published on this scale. In the South of Scotland the 

 6-inch maps have been used ; but in the North of Scotland the 

 survey will be mainly on the 1-inch scale. In Ireland the 6-inch 

 maps have always been employed for field work. 



In Ireland the drift has always been shown upon the 1-inch maps 

 by ' stippling.' Originally no glacial drift was shown upon the 

 English maps; but in 1871 the publication of drift maps was com- 

 menced, and two editions of many of the maps are now issued — • 

 solid and di-ift. In the East of England only the drift maps are 

 issued, very little being here known of the solid geology. 



At the end of 1883 the field survey of the original 1-inch map of 

 England and Wales was completed ; the survey of the drifts over the 

 areas over which these are not yet mapped has been commenced. 



In Ireland and Scotland there is only one system of numbering 

 the maps. In England some maps are in sheets, some are divided 

 into quarter-sheets. In the new maps of the Ordnance Survey the 

 system of dividing into quarter-sheets will be discontinued. The 

 maps and their divisions in the North of England are the same in 

 the old and the new series, the numbering only being different ; but 

 in the South of England there is no relation between the boundaries 

 of the old and the new maps. 



In addition to the maps there are ' Horizontal Sections,' on the 

 scale (for heights and distances) of six inches to a mile. These are 

 published at 5s. each ; many have ' Explanations,' price 2d. each. 



The details of Coal Measures, Cliff Sections, etc., are given on 

 sheets of 'Vertical Sections,' 3s. 6d. each. 



An ' Index Map,' scale four miles to the inch (1 : 253,440) has 

 been published of Wales and the adjacent districts, in six sheets, 

 price 3s. 6d. each. An Index Map of the whole of England and 

 Wales, upon the same scale, is now in progress. 



In all maps of the United Kingdom the meridian is Greenwich. 



The publication of the Maps of England dates from about 1839, 

 those of Ireland from 1855, of Scotland from 1859.' 



The number of maps and sections published is shown in the fol- 

 lowing table : — 



England 

 ,and. Wales. 



Ireland. 



Scotland. 



Total. 



n^fsZo) ^ Solid 183 N 



(sheets' or quarter- ^ Drift edition of 

 sheets in England \,'°.^'^"^^P •• ^9 

 andAVales) j Drift only ... . 12) 



6-inch maps (1 : 10,560) 



244 



216 



129 



69 



180 



10 



30 



1 



33 



128 

 9 



7 



457 



354 

 168 



77 



Horizontal sections 



Vertical sections 



Total 



658 



221 



177 



1056 







1 A Catalogue of the Publications of the Geological Survey of the United Kingdom 

 to 1884 has just been issued, with index maps, pp. 95, price Is. 



