12 THE FELSPARS. 



Sziibo's Eine ncno Methodo die Felspathe audi in Gesteinen zu 



bestiiinnen. 

 Boricky's Pamphlet on the method of discrimiuation by the use of 



Hydrofluosihcic Acid. 



(Tlie last four in German.) 

 Fouquc and Levy's grand book on Microscopic Petrology " Lcs Koches 



Eruptives de la France." 



