Just Published. Price 3s. 6d. nett. 



PETROGRAPHICAL & GEOLOGICAL 

 INVESTIGATIONS 



OF CERTAIN 



TRANSVAAL 



NORITES, GABBROS, 



AND 



PYROXENITES, 



And other South African Rocks. 



BT 



J. A. LEO HENDERSON, M.E. (I^reiberg), M.A.I.M.E., 



JOHANNESBUKG, TkANSVAAL. 



8vo. 66 pages and. 5 Plates. 



ILontion : 

 DULAU & CO., 37, SOHO SQUARE, W. 



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 TO THE EDITOR OF THE GEOLOGICAL MAGAZINE, 



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 MESSRS. DULAU & CO., 37, SOHO SQUARE, LONDON, W. 



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