SPECTROSCOPY 
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BY 
E. C. C. BALY, C.B.E., M.Sc., F.R.S. 
GRANT PROFESSOR OF INORGANIC CHEMISTRY IN THE UNIVERSITY OF LIVERPOOL 
FELLOW OF UNIVERSITY COLLEGE, LONDON 
THIRD EDITION 
IN FOUR VOLUMES 
Vol. Ill 
WITH SIXTY ILLUSTRATIONS 
LONGMANS, GREEN AND CO. LTD. 
39 PATERNOSTER ROW, LONDON, E.C. 4 
NEW YORK, TORONTO 
CALCUTTA, BOMBAY AND MADRAS 
1927