TIIK I.ITKI:AH-|;K u\- IIISTOIIHAI. 01 27 



important facta respecting eacli system of rocks. The book in 

 designed to include only so much information about each great 

 series of stratified deposits as the student may be expected to 

 read and to have before him for constant reference. Description.- 

 of each successive series will l>e given with a certain amount of 

 detail concerning the variations which they exhibit in the British 

 Islands, and their representatives on the European continent will 

 l>e indicated in a more concise manner, but yet in sufficient detail 

 to give the student some idea of their known extent and of the 

 conditions under which they were deposited. 



But the task of selecting information from the great man of 

 detail which has now been accumulated is not an easy one, and 

 further, what is regarded as specially important in one part of tin- 

 country may seem of less importance in another part, for naturally 

 each teacher will wish his pupils to become specially acquainted 

 with the rocks of the country or district in which they live. I 

 propose, therefore, in this chapter to indicate briefly what an- tin- 

 most important and useful publications, how they can be obtained, 

 and how they should be used, in order that the reader may learn 

 how to extend his knowledge of any particular series of rocks, or 

 to find out what has been published about the geology of any 

 special district. 



The publications may be grouped under four heads Maps, 

 Stratigraphy, Palaeontology, Palieogeography. 



HAPS 



It is necessary that the student should have access to a geological 

 map of the British Islands. Every teacher will doubtless see the 

 necessity of exhibiting one in his lecture-room, but every studi-nt 

 should as soon as possible acquire one for himself. Fortunately 

 a good cheap map of the British Isles is no longer a desideratum, 

 for one is now issued by the Geological Survey at the low price of 

 2s. There are several others on a larger scale at a higher price, a* 

 well as good separate maps of England, Scotland, and Ireland. 



The following general maps may be recommended : 



1. Geological Survey Index Map. Scale 25 miles to an inch, 



2s. 



2. Geological Map of the British Islet, from Stanford's London 



Atlas. Price as separate map, 10s. 6d. 



3. Stanford's Geological Atlas of Great Britain and Ireland, 



edited by H. B. Woodward, 2nd edition enlarged, with 

 plates of characteristic fossils. Price 12s. 6d. net 



