Sur la thermogravimétrie des précipités analytiques : Dosage du Potassium

The authors have studied the pyrolysis of 10 compounds of potassium and defined the limits of temperature between which they must dried in order to be determined accurately by weighing. Apart from the hexanitritocobaltate, the use of which is restricted to volumetric and coloimetric analysis, it can be said that the 9 other salts examined are well suited to the determination of potassium, the hydrontertrate, used within the limits prescribed by the authors, merits special attention.     

M/'ethode d'analyse qualitative des cations sans s/'eparations syst/'ematiques

The authors have formerly described a qualitative method for the analysis of Cations according to which separations were reduced to a minimum, each metal being detected by an independent test.They presently seek to improve this method, with special regard to the case when small quantities of an element are to be found in the presence of large proportions of one or more other cations.In this first paper are given the results for the following metals arsenic, tin, antimony, bismuth.     

Zwei Lückensätze Über Polynome in Endlichen Primkörpern mit Anwendung auf die Endlichen Abelschen Gruppen und die Gaussischen Summen

Ohne Zusammenfassung