12 EXPLANATORY NOTES. 



D. P. J., Ding. J., or Dingler's J. "Dingler's Polytechnisches Journal." 



Erd. J. "Erdmann's Journal." 



Gilb. Ann. "Gilbert's Annalen." 



J. F. P. "Journal fiir Praktische Chemie." 



Mem. Amer. Acad. "Memoirs of the American Academy." 



Nich. J., or Mch. Journ, "Nicholson's Journal." 



P. A. "Poggendorfs Annalen." "Erganz. bd." refers to the "Erganzungs 

 Band." 



P. M. "Philosophical Magazine." 



P. T., or Phil. Trans. "Philosophical Transactions." 



Q. J. S. "Quarterly Journal of Science." 



Schw. J., or Schweig. J. "Schweigger's Journal." 



S. J., or Sill. J. "Silliman's American Journal." 



Wien Ak. "Sitzungsberichte der Akademie zu Wien." 



Zeit. An. Chem., or Zeit. Anal. Chem. "Zeitschrift fiir Analytische Chemie." 



