20 



AUTHOR INDEX. 



Smith, see Frerichs and Smith. 



Soret, lo, II, 12. 



Stapff, 6. 



Stolba, 8, lo, II, 12, 13. 



Strohecker, 15. 



Thalen, 7, 8, 13. 

 Thompson, C. M., 16. 

 Thomsen, 9. 

 Topsoe, 8, 9, 



Watts, H., 5. 

 Welsbach, 13, 14, 

 WilJgerodt, 16. 

 Williams, 6. 

 Winkler, 7. 

 Wyrouboff, 10. 



Young, 8. 



Zschiesche, 7. 



