242 EEPOKT— 1882. 



M. Mojsisovics for Austria-Hungary. 



Mr. Topley for England. 



M. Renevier, as Secretary of the Original Committee on Map Colour- 

 ing. 



The details of the execution of the map were left to the Committee, as 

 also were some questions relating to colouring. The Congress, however, 

 decided upon the following colours : — 



Rose carmine for crystalline schists, whenever there is no certain 

 proof that they are of Cambrian or Post- Cambrian age. 



Bright rose colour for rocks of Pre-Cambrian age. 



Pale rose colour for crystalline rocks of indeterminate age. 



Violet for Trias. 



Blue for Jurassic (the Lias a darker tint.) 



Green for Cretaceous. 



Yellow for Tertiary, the higher beds being the lighter shades. 



The subdivisions of a system are to be represented by shades of the 

 colour adopted, the darker shade representing the older subdivision. 

 Divisions may also be shown by reserved spaces of white or by lines. 



The lettering for sedimentary rocks to be based on the Latin alphabet - 

 for eruptive rocks on the Greek alphabet. 



The monogram of a system to be formed by the initial capital of the 

 name of the system ; subdivisions to be denoted by the initial small 

 letter of its name in addition to that of the system. Smaller divisions to 

 be denoted by figures, one denoting the oldest example : — Silurian, S ; 

 Ludlow, SI ; Upper Ludlow, &\ 



The use of palteontological, orographical, chronological, petro graphi- 

 cal, and geotechnical signs is recommended. 



The arrangements finally made for the publication of the map are as 

 follows : — Reimer and Co., of Berlin, are the publishers. The map will 

 be issued in forty-nine sheets (7 by 7) ; the size of the entire map when 

 joined together will be rather over 12 ft. by 10 ft. The British Isles are 

 contained witliin two sheets, with a slight extension of the south-west of 

 Ireland beyond the map-margin. The southern sheet contains a large 

 part of the north and north-west of France. 



The cost of engi'aving and colouring the map, including the prepara- 

 tion of 1,000 complete copies, is estimated at 4,000Z. To meet this expense 

 contributions will be given by the various Governments of Europe. 

 England's share of the expense is 400Z., for which 100 copies of the com- 

 plete map will be given. The Royal Society has voted the first instal- 

 ment of 751. from the Government grant ; and has also given 75Z. towards 

 the cost of preparing the map in England so as to be ready for engraving, 

 and of printing the reports of the various sub-committees on Geological 

 Nomenclatui'e, &c. 



England is also to supply the requisite information for the topography 

 and geology of Palestine. 



The engraving of the map is well advanced. Streams and railways 

 are given in great detail ; the names of places of geological interest will 

 be inserted ; also the names of the mountain chains and the heights of 

 the chief summits (in metres). 



