Dating the First Periodic Table in Spanish Textbooks: The Case of Eugenio Mascareñas

The periodic table included at the end of Eugenio Mascareñas's textbook has been regarded in some essays as the first one published in Spanish. It was not unusual for a nineteenth-century book issued in installments to be completed one or two years after the date indicated on its title page. In this particular case, although the book comprises only 222 pages, its publication took five years to complete.