402 — Scientific Intelligence. 
mental note. An increase of wave-length of homologous lines of 
similar elements corresponds with a greater intensity of chemical 
kinetic energy. Hartley’s photographs of the ultra-violet region 
completely confirm these views. Stoney had shown that the 
ases are to be referred to periodic motions within the 
A FR 
fundamental vibration whose wave length is 0°013127714 mm. A 
harmonic relation exists also between the lines in the spectra of 
magnesium, zinc, cadmium, aluminum, and in calcium, strontium 
i xamined, 
bf 
the wave-lengths of lines in twenty spectra. To stu onve- 
niently the harmonic relations between lines and groups of lines, 
it is nec tra according to their inverse wave- 
n 
single lines and a pair. Silicon three single lines, three pairs and 
3264°4, 8247-2 (very strong). Both the sub- 
stances were pure. Since the correctness of the measurements 
cannot be relied on beyond 0°1 tenth-meter, though they are be- 
lieved to be correct to 0°2, it is impossible to say. absolutely 
whether the above lines are or are not Sdedk oe Chem. Soe 
xliii, 390, Sept., 1883. - G. F. B. 
2. On e Reactions of Tellurium.—It is generally stated 
that tellurides in solution have a reddish-violet ch i 
¥ 
or. DEMARGA oe 
