Quarterly Journal of Science N?, 



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Skewing the Area at' the 



Coal-Formation 



At. tin dose of the, 



CARBOMIFEROUS PERIOD. 



The, shaded portions shew when/ ; 

 r >y Cba^T-FonruxUon/i 



jja Tkz TmsJuidtdportions wire/ Zand/ 

 Surfaces otaring ~Sw CoaL Period: 



H.liuJl W 



