PLATE 5. 



Figure 25. Horizontal section of boghead from Autun. (X 80.) 



Figure 26. — Vertical section of oil-shale from New South Wales, showing 

 masses of Reinschia australis. (X 40.) 



Figure 26. Part of the same more highly magnified. (X ISO.) 



Figure 28. Horizontal section of oil-shale from New South Wales. (X 40.) 



Figure 29. Part of the same. (X 120.) 



Figure 30. Horizontal section of Pennsylvania coking coal showing 

 presence of wood elements. (X 180.) 



