标题：Péndulos astronómicos y cronómetros marinos de la armada: el observatorio de San Fernando y los antecedentes del patrón nacional de tiempo (1753-1957)
出版社：Consejo Superior de Investigaciones Científicas
摘要：This article is a brief review on the precision clocks in use by the Spanish Navy during the XVIII, XIX and XX centuries. It deals with the introduction in Spain of marine chronometers needed for the application of the new techniques of astronomical navigation and also, with the evolution of the methods for time keeping and determination by astronomical pendulum clocks. Both facts placed the Navy and its Observatory in a good starting position for future activity in the field of the scientific study of time in our country.
