Johannes Hevelius’s Selenographia Manuscript in Vilnius

Johannes Holtfreter

Johannes Holtfreter (1901-1992)

Johannes Holtfreter [6] made important discoveries about the properties of the organizer [7] discovered by Hans Spemann [8]. Although he spent much time away from the lab over many years, he was a productive researcher. His colleagues noted that the time he spent away helped revitalize his ideas. He is credited with the development of a balanced salt medium to allow embryos to develop; the disc...

Johannes Gessners Pariser Tagebuch 1727

PIETRO CORSI, Oltre il mito: Lamarck e le scienze naturali del suo tempo, Bologna, II Mulino, 1983, 8vo, pp. 432, L.30,000 (paperback). While Charles Darwin still awaits a satisfactory scientific biography, four studies have appeared recently which illuminate the position of Lamarck in the history of science. While two of them, by R. Burckhardt and L. Jordanova, come from the Anglo-Saxon world,...

Johannes Müller und die Philosophie

MICHAEL HAGNER and BETTINA WAHRING-SCHMIDT (eds), Johannes Muller und die Philosophie, Berlin, Akademie Verlag, 1992, pp. 341, DM 88.00 (3-05-002232-9). Johannes Muller (1801-1858) is often referred to as the "father" of modern German physiology. His education and subsequent career coincided with the period during which the natural sciences were gradually emancipated from the "Queen of the scie...

Johannes Molanus on Provocative Paintings

The first ecclesiastical writer to take the Tridentine decrees relating to the use and abuse of religious imagery1 as a starting point for an analysis of the question of nudity in art was Johannes M ~ l a n u s , ~ in his De Picturis et Imaginibus Sacris It is true that Gilio (Louvain 1 5 7 0 ) ~ ~ da Fabriano had already published his Dialogo degli Errori de' Pittori in 1564,~ the year after t...