En este libro se realiza un recorrido por la evolución de los instrumentos empleados en astronomía y geodesia, analizando su origen y progresos a lo largo del tiempo. Los autores presentan discursos leídos ante la Real Academia de Ciencias Exactas Físicas y Naturales en la recepción pública del señor D Carlos Ibáñez e Ibáñez, brindando un conjunto de enseñanzas valiosas para los interesados en estas disciplinas.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.