. The Philosophical magazine; a journal of theoretical, experimental and applied physics. /•u/. Fiij Analysis by Spectrum-observations. 331 we proceed to recount the experiments which one of us hasconducted for the purpose of estabhshing the properties of thetwo new elements, and their more important compounds. I. Of the Preparation, Atomic Weight, and occurrence of theRubidium Compounds. The pure chloride of rubidium was procured from the salineresidue obtained by fusing a mass of about 150 kilogrammes ofSaxony Icpidolitc, from which the alkaline earths and lithiumsalts had been removed.
. The Philosophical magazine; a journal of theoretical, experimental and applied physics. /•u/. Fiij Analysis by Spectrum-observations. 331 we proceed to recount the experiments which one of us hasconducted for the purpose of estabhshing the properties of thetwo new elements, and their more important compounds. I. Of the Preparation, Atomic Weight, and occurrence of theRubidium Compounds. The pure chloride of rubidium was procured from the salineresidue obtained by fusing a mass of about 150 kilogrammes ofSaxony Icpidolitc, from which the alkaline earths and lithiumsalts had been removed. The separation of the new element,and the preliminary determination of its atomic weight, wereeffected as follows :— The saline residue was dissolved in water, and treated withabout 100 grms. of bichloride of platinum, a quantity, however,quite insufficient to precipitate all the potassium; the doubleplatinum salt was then boiled out twenty times with a smallvolume of water, and the boilings added to the original solutionof the saline residue, whereby a precipitate again occurred,which was tr
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