ele BANE i a SS See aa et die OF i a A el ea le SaaS Ga ot el eed yee 
Physics and Chemistry. 405 
1280 brightest 
1460 
Near G 
We are indebted for this correction to Mr. Charles 8. Peirce by 
whom the observations were made. 
The brightest line is fully 20 times as bright as any other. The 
faint lines should perhaps be called bands rather than lines as they 
exhibit an appreciable breadth. On June 6th 5 lines were seen, 
the brightest being 1280 of Mr. Huggins’ scale. . G. 
On a new element associated with Zirconium.—The existence 
ted through certain specimens of zircon was first observed by 
rof. Church in 1866 and a notice of his results published in the 
Intellectual Observer, vol. ix, p. 291. The same bands have been 
Tecently observed independently by Mr. H. C. Sorby, who has in- 
erred trom them the existence of a new element to which he gives 
the name of jargonium. The natural silicate of jargonium is al- 
most, if not quite, colorless but gives a spectrum exhibiting more 
than a dozen narrow black lines more distirict than even those of 
didymium. The borax bead gives no absorption bands, but by 
flaming crystals of borate of jargonia are formed, and the spectrum 
substance. Another remarkable property of jargonia is that its 
mpounds may exist in three different crystalline states, giving 
of the borax bead 
found, however, t 
undergoes a permanent shortening about equal in amount to the 
