46 SIR WILLIAM CROOKES ON SCANDIUM. 



BIBLIOGRAPHY OF SCANDIUM. 



" On Scandium, a New Element." L. F. NILSON. ' Berichte,' 1879, No. 6 ; ' Comptes 



Rendus," March 24, 1879, vol. Ixxxviii., p. 645; in abstract in 'Chemical 



News,' August 15, 1879, vol. xl., p. 76. 

 " On Scandium." P. T. CLEVB. ' Bull. Soc. Chim. de Paris,' June 5, 1879, vol. xxxi., 



p. 486. 

 "On Scandium." P. T. CLKVE. 'Comptes Rendus,' August 18, 1879, vol. Ixx.xix., 



p. 419 ; in full in ' Chemical News,' October 3, 1879, vol. xl., p. 159. 

 " Atomic Weight of Scandium, and on certain of its Characteristic Salts." L. F. 



NELSON. 'Comptes llendus,' July 12, 1880, vol. xci., p. 118; in abstract in 



' Chemical News,' August 1 3, 1880, vol. Ixii., p. 83. 

 " Atomic Weight and certain Characteristic Compounds of Scandium." L. F. NILSON, 



' Berichte,' vol. xiii., No. 13. 

 " Brilliant Spectral Hays of the Metal Scandium." II. THALEN. ' Comptes Rendus,' 



July 5, 1880, vol. xci., p. 45; 'Chemical News,' July 30, 1880, vol. xlii., 



p. 60. (THALEN only gives the wave-lengths of lines in the visible portion of 



the spectrum.) 

 " Spectral Researches on Scandium, Ytterbium, Erbium, and Thulium." TH. THALEN. 



' Journal de Physique ' ; ' Chemical News,' May 11, 1883, vol. xlvii., p. 217. 

 W. CROOKES. " On Radiant Matter Spectroscopy : Examination of the Residual 



Glow." ' Proc. Roy. Soc.,' February 1887, vol. xlii., p. 111. "Scandium, 



either in the form of earth or sulphate, phosphoresces of a very faint blue 



colour. Addition of lime does not bring out any lines." 

 " The Arc Spectrum of Scandium, and its Relation to Celestial Spectra." By 



Sir NORMAN LOCKYER and F. E. BAXANDALL. ' Proc. Roy. Soc.,' February, 



1905, vol. Ixxiv., p. 538. 

 G. URBAIN ('Journal de Chimie-Physique,' February, 1906, vol. iv., p. 64) gives a 



passing reference to scandium as follows: "In none of my fractions have I 



been able to observe the presence of scandium. I am led to think that this 



element does not belong to the group of rare earths, properly so-called. 



Sir W. CKOOKES (' Chemical News,' vol. xci., p. 61) thinks he has detected 



this element in my gadolinia. [Quite true. W. C.] The statement is denied 



by EBERHARD (' Zeit. Anorg. Chemie,' xlv., p. 374)." 



