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 was considered in certain essays as the first published in Spanish:

It was not unusual for a 19th-century book published in installments to be completed one or two years after the date indicated on the title page. In this particular book, even though it only has 222 pages, it took five years to be completed.