Costüme zu dem Künstlermaskenfeste in Frankfurt 1855 : aus der Zeit des 16ten Jahrhunderts

... E. Schalck am Städel'schen Institute

Zur Erinnerung an das Künstlerfest im Februar 1855

Szene auf dem Kostümball des Künstlerfestes in Frankfurt am Main

"Die Familie Mozart" von J. N. della Croce, 1780/81

Signatur des Originals: S 36/F12453

Aristote amoureux : ou le philosophe bridé ; opéra-comique, en un acte & en Vaudeville ; représenté pour la première fois par les Comédiens Italiens ordinaires du Roi, le vendredi 22 août 1780

[Musique de Pierre-Antoine-Augustin de Piis. Texte de Pierre Yon Barré]

Geochemistry on manganese nodules from Loch Fyne, Scotland

Manganese nodules and manganese carbonate concretions occur in the upper 10-15 cm of the Recent sediments of Loch Fyne, Argyllshire in water depths of 180-200 m. The nodules are spherical, a few mm to 3 cm in diameter, and consist of a black, Mn-rich core and a thin, red, Fe-rich rim. The carbonate occurs as irregular concretions, 0.5-8 cm in size, and as a cement in irregular nodule and shell fragment aggregates. It partially replaces some nodule material and clastic silicate inclusions, but does not affect aragonitic and calcitic shell fragments. The nodules are approximately 75% pure oxides and contain 30% Mn and 4% Fe. In the cores, the principal mineral phase is todorokite, with a Mn/Fe ratio of 17. The rim consists of X-ray amorphous Fe and Mn oxides with a Mn/Fe ratio of 0.66. The cores are enriched, relative to Al, in K, Ba, Co, Mo, Ni and Sr while the rims contain more P, Ti, As, Pb, Y and Zn. The manganese carbonate has the composition (Mn47.7 Ca45.1 Mg7.2) CO3. Apart from Cu, all minor elements are excluded from significant substitution in the carbonate lattice. Manganese nodules and carbonates form diagenetically within the Recent sediments of Loch Fyne. This accounts for the high Mn/Fe ratios in the oxide phases and the abundance of manganese carbonate concretions. Mn concentrations in the interstitial waters of sediment cores are high (ca. 10 ppm) as also, by inference, are the dissolved carbonate concentrations.

Parentesco, poder y religiosidad en las fiestas públicas de la Buenos Aires Virreinal. 1780-1808.

A lo largo del siglo XVIII, las fiestas públicas se convirtieron en espacios de negociación y transformación de las estructuras y jerarquías sociales de grupos. Este trabajo se propone analizar las tensiones y conflictos de poder que se manifestaron en las elebraciones públicas, en el período comprendido entre la creación del Virreinato del Río de la Plata y la vacante regia de 1808, en Buenos Aires.