PHILOSOPHICAL TRANSACTIONS 
I 
pv 
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OF THE 
ROYAL SOCIETY OE LONDON. 
Sebibs a, Vol. 220. Pp. 335-468. 
[Plates 2-5.] 
iSH M0§/- 
k CRITICAL STUDY OF SPECTRAL SERIES 
Part V—THE SPECTRA OF THE MONATOMIC GASES. 
BY 
W. M. HICKS, F.R.S. 
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Printed and Published for the ROYAL SOCIETY by 
HARRISON AND SONS, 44-47, ST. MARTIN’S LANE, LONDON, W.C. 2. 
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1920. 
Price Eight Shillings. 
680 . 
19.6.20 
