Chemistry and Physics. 105 
irotes, the light of one spark being allowed to pass through the up- 
per, that of the other through the ‘lower half of the slit, so that one 
spectrum is seen above the “other. When the two pairs of electrodes 
are clean, the two spectra are perfectly sat when however a me- 
tallie compound is placed upon one pair, the corresponding spectrum 
immediately shows the lines belonging i the metal introduced. The 
author has satisfied hiinself that in this manner even the metals of 
the rare earths, yttrium, erbium, terbium, etc., may be recognized most 
quickly and certainly. It is therefore to be expected that “by the help 
of Ruhmkorff’s apparatus, the spectral method of analysis may be ex- 
to the detection of all metals. The researches which the author 
h ertaken in connection with Bunsen nie ihe is hoped, determine 
this visi —Journal fiir prakt. Chemie, No. 1 
. Ona New aeannne Metal. —Bowst N has dnewrered in the waters 
an extremely characteristic spectrum, which at the e time sabia 
the remarkable simplicity of the spectra of the other kalne metals. Its 
spectrum consists of only two blue lines—a weaker li ing 
with the blue strontium line and another which. lies onl a little farther 
_ toward the blue end of the spectrum, and which vies in intensity and 
| Cela of Parole with the red line of lithium —Journal Sir prakt. 
mre, 16 
3. On the aan of Flames.—Merz has communicated some investiga- 
_ tions on the coloration of the flames of Bunsen’s burner and of hydrogen 
 ~gas Pei a he the presence of various substances. These observations 
_ may be considered as supplementary to those of Bunsen tee noticed 
in this Jecsnd: and in less certain, are simpler and m 
applied than the processes of the spectral analysis. The siiow ‘employs ; 
 @ flame of pure hydrogen as well as that of Bunsen’s burner, and in addi- 
tion, makes use of blue, violet, red and green glasses, The new 
ces which he describes as giving characteristic colors to the flame of 
_ Bunsen’s burner, are nitric, chromic and molybdic acids, while pho ae 
_ and sulphuric acids give a peculiar coloration to the dark core red the lame i 
_ of hydrogen. 
lors: e seen ett sell substance: 
Am. fog Sc1.—Srconp Serres, Vou. “XXXI, -“* 91.—Jan.. 1861, : 
4 ; 
