Uvádíme a porovnáváme názory největších myslitelů antiky a středověku - Platóna, Aristotela, Augustina a Tomáše Akvinského - na povahu a vlastnosti času. Všímáme si, jak se jimi formulované názory a problémy odrážejí v současné fyzice., Pavel Macků, Jan Novotný., and Obsahuje seznam literatury
Knihovna Akademie věd ČR Praha CZ TF 347 adl. 24, Národní knihovna ČR Praha CZ 46 C 183 adl. 7, Vědecká knihovna v Olomouci Olomouc CZ 35.529, and BCBT41869
Národní knihovna ČR Praha CZ Diss. E 4717, Národní knihovna ČR Praha CZ 46 C 186 adl. 37, Klášter Rytířského řádu křižovníků s červenou hvězdou - knihovna Praha CZ XVIII K 4 adl. 33, Knihovna Akademie věd ČR Praha CZ TF 347 adl. 30 def., Metropolitní kapitula u sv. Víta v Praze Praha CZ C. d. beta 45 adl. 11, Österreichische Nationalbibliothek Wien AT 36. C. 23, and BCBT41132
The prehistory of clay mineralogy is highlighted from the beginnings in ancient Greece to the mineralogical works of Agricola, in particular his famous handbook of mineralogy, entitled De natura fossilium (1546). Starting with a few scattered hints in the works of Archaic and Classic Greek authors, including Aristotle, the first treatment of clays as a part of mineralogy is by Theophrastus. This basic tradition was further supplemented by Roman agricultural writers (Cato, Columella), Hellenistic authors (the ge ographer Strabo and the physicians Diosco rides and Galen), the Roman engineer-architect Vitruvius, and finally summarized in Pliny’s encyclopedia Naturalis historia, which has become the main source for later authors, including Agricola. It is shown to what extent Agricola’s work is just a great summary of this traditional knowledge and to what extent Agricola’s work must be considered as original. In pa rticular, Agricola’s attempt to a rational, combinatorical classification of "earths" is recalled, and aplausible explanation is given for his effort to include additional information on Central European clay depos its and argillaceous raw material occurre nces. However, it is shown that - in contrast to common belief - Agricola was not the first to include "earths" in a mineralogical system. This had been done almost one thousand years earlier by Isidore of Seville., Willi Pabst and Renata Kořánová., and Obsahuje bibliografické odkazy