PART I. AUTHOR-INDEX. 3 1 



Croft, W. B. Spectra of various orders of colours in Newton's Scale. 



Proc. Phys. Soc. Dec. i6, 1892; Beibl. (1893) 1072. 

 . Some observations on refraction. Phil. Mag. (5) 38 



(1894) 70-81; Beibl. (1894) looi. 



Crookes, W. What is Yttria? Chem. News 54 (1886) 39; Jahresb. 



(1886) 403; C.-R. 102 (1886) 1464-1466. 

 . Fractionation of Yttria. Chem. News 54 (1886) 155; Jah- 

 resb. (1886) 406. 

 . Radiant Matter Spectroscopy. Proc. Roy. Soc. 40 (1886) 



77, 236; Jahresb. (1886) 307. 

 . Examination of the residual glow. Chem. News 55 (1887) 



107-110, 119-121, 131-132. 

 . Phosphorescence spectrum of the Yttrium Earths. Chem. 



News 55 (1887) 25; 56 (1887) 59, 62, 72, 81; Beibl. (1888) 195; 



Jahresb. (1887) 357. 

 . Genesis of the Elements. Roy. Inst. Gt. Brit. Feb. t8, 



1887. 

 . Recent researches on the rare earths as interpreted by the 



spectroscope. Chem. News 60 (1889) 27-30, 39-41, 51-53; Beibl. 



(1890) 173. 

 . Ueber das Spektrum des Argons. Ztsch. phj^sikal. Chem. 



15 (1894) 369-380. 

 . The Spectra of Argon. Phil. Trans. 186 (1895) 243-251; 



Chem. News 71 (1895) 58-59; 72 (1895) 66-69 (gives the wave- 

 lengths). 

 . Spectrum of the gas from Cleveite. Chem. News 71 (1895) 



151; Beibl. (1895) 634- 

 . Spektroskopspalt. Chem. News 71 (1895) 175; Beibl. 



(1895) 782. 



. Spectrum of Helium. Chem. News 72 (1895) 87-89; Beibl. 



(1895) 883; Astrophys. J. 2 (1895) 227-234. 



. Spectrum of Ramsay's compound of Argon and Carbon. 



Chem. News 72 (1895) 99; Beibl. (1896) 531. 

 . The alleged new element, Lucium. Chem. News 74 (1896) 



259- 

 . Das Spektrum des Heliums. Ztsch. anorgan. Chem. 11 



(1896) 6-13. 



. Helium in the Atmosphere. Nature 58 (1898) 570. 



. Position of Helium, Argon and Krypton in the scheme of 



the elements. Proc. Roy. Soc. 63 (1898) 408-411. 

 . Supposed new gas Etherion. Chem. News 78 (1898) 221- 



223; Beibl. (1899) 203. 



