Chemistry, 119 
quired a hardness comparable only to that of the hard white cast-iron. 
the grains the price ‘a steel would. be increased y only 7 or ae 
os the 100 kilogrammes.— Ann, de Chimie, Ixviii, Ww. G. 
€ p. tt for further notice of titanium in pig ii 
Bi On a new series of metallic oryds.—l. Rose si aires a class 
of oxyds which contain four equivalents of metal to one of oxygen, The 
type of this class of compounds is an oxyd of copper which has = for- 
mula Cu,O. When a solution of sulphate of copper is added to an ex- 
eess of a very dilute solution of protochlorid of tin in caustic alkali a 
hydrate of protoxyd of copper 1s precipitated, which after a short time 
becomes yellow, and on shaking passes ito olive-green ; after a time this 
in turn changes sorte and finally 6g — ed to metallic copper. 
@ green oxyde t be obtained in a state of purity without great 
difficulty, owing wr as mie aise to oxydize a also to the difficulty of 
removing the ‘last traces of tin. Rose has, however, succeeded in 
aetatinss which’ probably: consists of Cu,Cy, The moist oxy is not 
OLY 
oxyd and provoxyd Rose m: vintains that t o suboxyd of sive reg 
2 This view, pen he oe oa a long tie time defended, he nti to 
the alkaline metals, regarding s ash as Na,O an ie 
recalls the formation by Bunsen “of ‘Bins alkaline subchlorids “by elec- 
trolysis, and states that these compounds can also be obtained by fusing 
potassium with chlorid of — or sodium with chlorid of sodium, 
in a current of hydrogen Rose considers these subchlorids as K,Cl 
and Na,Cl. He proposes to pia a for the received nomenclature of 
the basic oxyds, the terms quadrantoxyd, semioxyd, isoxyd, diploxyd 
and sesquioxyd, denoting respectively the oxyds w we! ormala 4 
itten R,O, R 
written R : O,, Rz04.—Pogg. Ann., 
ote.—It a pears at least extremely probable, shat ihe ‘yeautitul tive 
ri eons colors produced y the action of metallic sodium or potassium 
‘nie bodies containing chlorine, may be expiained by 
inpecti Seto jee te aisles sobchineide are found like those 
menti Seek Sy eames and Rose. I recall, for example, the memoir of 
