KNOWLEDGE. 



May, 1915. 



Index of Spectra 



NEW SERIES. 



Designed to complete and bring up to date 

 the Index of Spectra and previous Appendices. 



Appendix V contains Air, Udebaranium, Aluminium, 

 Alumina, Vmmonia, Antimony, .vrgon, Arsenic, 

 Barium, Beryllium, Bismuth, Boron, Bromine, 

 Cadmium, Caesium, Calcium Carbon, Cassiopeium, 

 Cei ium, Chlorine, 12s. (id. 



Appendix W contains Chromium, Cobalt, Copper, Dys- 

 prosium, Erbium, E pium, Fluorine, and " Additions 



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Appendix C Spectrum of Iron, ti lluric lines ol jolai spectrum, spectrum ol 

 Hydrogen), 7s. 6d. 



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 i i. . ,'■ irption pecti urn ol Bromiro . \x\ spectrum of 

 Vlumina), 5s. 6d. 



Appendix E 



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 and Table ol reduction I i vacuum), 4s. 6d. 



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 Appendix G (Rowland's Standard Wave-lengths, Spectra oi Hg, He, Cd, 



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 Si, and the sp i trum ol Argon), 6s. 



Appendix N (Flame-spectrum ol Radium, infra-red spectra of Alkalies, 

 ulii.L\ iol< i spectrum i >J I horiura i, 4s. 



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From "Nature/' December 11th. 1913: — 



" ' Watts" Index oi Spectra." — Vet another 

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