50 



are marked by contours for every 10 ft., and round the island 

 by contours for every 50 ft. Scale about 160 ft. per inch, 

 It is not geologically coloured. 



154. Model of Barren Island Volcano, Bay of Bengal, 

 latitude 12 15', N. ; longitude 93 50', E. Scale, 

 20 inches to the mile. Size, 50 inches square. Designed 

 by V. Ball, M. A., F.R.S. ; constructed by Miss "W. Spence. 



B. 23. 1890. 



This model is coloured to show the positions of the older lava,, 

 younger lava, alluvium, ash, and pumice. 



155. Eelief model of the Puy de Dome group, Au- 

 vergne, France. By L. I. Bardin and Commandant 

 Peigne. Scale, 1 njw 



E. 312. 1877. Published by C. Delagrave, Paris. 



The model is 32 in. by 20 in., and is executed in white plaster. 

 It is not geologically coloured ; nor is it accompanied by names, 

 contours, orientation. 



156. Relief model of the Puy de Dome group, Au- 

 vergne, France. Geologically coloured. Size, 32 in. by 

 20 in. Scale, oioiy. 



E. 313. 1877. Published by 0. Delagrave, Paris. 



This is the same model as the last, except that the lavas, 

 granites, &c., are coloured, but it is not provided with the names 

 of places or Puys. 



157. Terminological relief map by Eeyer of Gratz. 

 Size 8 in. by 5^ in. Scale about 6^- inches to the 



mile T^Vir- 



Lent by the Geological Laboratory, Royal College of 



1887. Science. 



Coloured agriculturally. Green, meadow land. Green dots, 

 forest. Brown, arable land. 



158. Geological model of a volcanic district. By 

 Reyer. Size 10 in. by 8^ in. Scale about 5 inches to 

 the mile -reVo- 



Lent by the Geological Laboratory, Royal College of 



1887. Science. 



Shows 10 colours, for light coloured Tuff, darker Tuff, 



Andesite, Andesite-Trachyte, Plagioclase-Trachyte, Common 



Trachyte, Quartz-Trachyte, Jurassic, Chalk, and Eocene. 



