Variations in spectra

• Publisher: Elsevier Science
• Year: 1880
• Tongue: English
• Weight: 56 KB
• Volume: 109
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(80)90388-9

✦ Synopsis

204

~7~+" Luminous 2~bes.

[Jour. Frank. Inst, Poisonous Toys.--The Parisian police have recently seized a :~mmber of caoutchotlc toys, on account of the employment of poisonous colors in their manuthcture.--Chron. Ltd.

C.

Coral

Cutting.--The coral fishers of" Italy reside mostly at Naples and at Torre del Greco. A school has been lately orgauized :at the latter place, ill an"o~ld nmnastery, for the purpose of giving special instruction in coral cutting and bringing that art to a still greater degree of perfection.--Chron. Ind. C.

Variations in

Speetra.--Wiillner discusses the various theorieS of AngstrOm, Pliicker, Hittorf, Lockyer and Z~llner, in regard to the dependence of spectra upon impurities, temperature, pressure, etc. From a long series of experiments with nitrogen, he concludes that the changes from band to line spectra depend principally upon the diminishing mlmber of the lmninous molecules.--Wied. Ann. C.