The intent of the present work is chiefly the presentation of a running commentary, preponderantly historical in complexion, on the detail of the text of St. Anselm's dialogue De Grammatico. At the same time the making intelligible of that text has demanded the concurrent proffering of logical elucidations. The framework adopted for the latter is the Ontology of S. Lesniewski. The unsuitability of other current systems of logic for the analysis of medieval doctrines has been suggested in HLM I. Hereunder the line of analyses proposed in HDG (an introduc tory study of De Grammatico) will for...

The material given in this 'Introduction to astronomical photometry' is the subject matter of a lecture at the University of Geneva. It is, therefore, intended for those students, physicists or mathematicians, who have completed their bachelor's degree or diploma, and are intending to work for their Ph.D. in astronomy. We assume then the elementary ideas of astrophysics, magnitude, colour index, spectral classes, luminosity classes, gradient, atmospheric extinction are already known. The student may find it useful to re-read the work of Schatzman 1], Dufay 2] and Aller 254] before...