Iggeret hat-tešûvā : ašer ʿalêhā pāqād we-ṣiwwā ... Yaʿaqōv Baʿal haṭ-Ṭûrîm

le-... Yônā Gērôndî

Señor. Con Auto del Vuestro Consejo... mandó V.M. al Claustro de esta Universidad Literaria que le informe si es conveniente a la publica enseñanza la separacion de las Aulas de Gramatica, que la Ciudad de Valencia tiene convenida con los Padres de la Compañia de Jesus, qué rentas son las destinadas para las cathedraticas de Latinidad ...

Texto fechado en Valencia, 1729

Representación al Rey N. Señor D. Phelipe V ... dirigida al mas seguro aumento del Real Erario y conseguir la felicidad, mayor alivio, riqueza y abundancia de su Monarquia ... /

Mode of access: Internet.

Effect of iron on grain refinement of high-purity MG-Al alloys

The effect of iron on the grain refinement of high-purity Mg-3%Al and Mg-91%Al alloys has been investigated using anhydrous FeCl3 as an iron additive at 750degreesC in carbon-free aluminium titanite crucibles. It was shown that grain refinement was readily achievable for both alloys. Fe- and Al-rich intermetallic particles were observed in many magnesium grains. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Grain size measurements in Mg-Al high pressure die castings using electron back-scattered diffraction (EBSD)

Optical metallographic techniques for grain-size measurement give unreliable results for high pressure diecast Mg-Al alloys and electron back-scattered diffraction mapping (EBSD) provides a good tool for improving the quality of these measurements. An application of EBSD mapping to this question is described, and data for some castings are presented. Ion-beam milling was needed to prepare suitable samples, and this technique is detailed. As is well-known for high pressure die castings, the grain size distribution comprises at least two populations. The mean grain size of the fine-grained population was similar in both AZ91 and AM60 and in two casting thicknesses (2 mm and 5 mm) and, contrary to previously published reports, it did not vary with depth below the surface.