THE VOLCANOES AND ROCKS OF PANTELLERIA 713 
tive, and the modes of the two basalts of Ferle and Sant’ Elmo may 
be roughly stated as follows, the orthoclase being reckoned in with 
albite. It is possible that the nephelite molecule of the norm 
exists as carnegieite in the feldspar. 
I ra 
Ai Dy/s \lOl tapos ae 50 Ab;An, 48 
INGEINS MCLE See I Jetta how grees ere Aa eed Re ea ke 32 
ATUGIIEG sola 22 OPES ence hee te ae naa 17 
(CURIOS 4 I en 9 IND AEILS Steer cudlorete ar, eke te 3 
(ORES oe Oo cet ni cea 14 aa 
POOLE Mes Accs acd oe das ws 8 5 1% 2 eo 
100 
