1892.] Mineralogy and Petrography. 617 
Frenzel’ has made a new analysis of gordaite and has found it to 
be identical with ferronatrite, while Arzruni has examined its crystals 
and declares them to be rhombohedral with a: c =1 : 55278. C. 
Schneider’ gives good analyses of six basaltic hornblendes, all of 
which contain over 4% of TiO,. 
IZeits. f. Kryst., xviii, p. 595. 
*Zeits. f. Kryst., xviii, p. 579. 
