
ABBREVIATIONS OF REFERENCES TO SOME OF 
THE JOURNALS. 
Ber. d. deutsch. Chem. Ges. Berichte der deutschen chemischen Gesell- 
schaft. Berlin. 
C. Rk. Comptes Rendus des Séances de Académie des Sciences. Paris. 
Chem. News. Chemical News. London. 
Drude’s Annal. Annalen der Physik. Leipzig. 
Phil. Mag. Philosophical Magazine and Journal of Science. London. 
Phil. Trans. Philosophical Transactions of the Royal Society of London. 
Phys. Rev. Physical Review. New York. 
Phys. Zeit. Physikalische Zeitschrift. 
Proce. Camb. Phil. Soc. Proceedings of the Cambridge Philosophical Society. 
Cambridge. 
Proc. Roy. Soc. Proceedings of the Royal Society of London. 
Theses-Paris. Theses présentées & la Faculté des Sciences de ’Université 
de Paris. 
Wied. Annal. Annalen der Physik. Leipzig. 
page 10, line 16; for “chapter 1x,” read “section 217.” 
page 274, last line; for “36 minutes,” read “21 minutes.” 
page 326, Radium, Second change, for “36 minutes,” read “21 minutes.” 
