[en] Projections of images accompanied by text recitals and the performance of musical melodies obtained significant sociocultural relevance in Spain between the first half of the nineteenth century and the first third of the twentieth. To fulfil their aims, these projections used a new technological device that was given such labels as fantoscopio (fantoscope), megascopio (megascope), microscopio solar (solar microscope) or interna de proyecci?n (projection lantern) and whose name was lent to a very popular medium for social communication known as the linterna m?gica (magic lantern). Its central element was a set of projection slides that were usually made from transparent glass. These formed the basis of any private or public session focused on instruction or fun. The slides contained images that illustrated a wide range of genres, from fables and children?s stories to allegories, comedies, information and current events. Despite the magic lantern?s undoubted influence in modern-era Spain, it has had only a residual presence in the academic world as an object of scholarly study. Fortunately, a shift that is more in tune with its cultural relevance is currently taking place, and this has been caused to a fair extent by the innovations and efforts undertaken in the last decade through interdisciplines such as media archaeology, an area driven by authors such as Zielinski (2008), Hutahmo (2011) and Parikka (2011). In view of the challenge of addressing an object of study as extensive as the magic lantern in Spain, this doctoral thesis studies only the educational potential of projection slides preserved in Spain and poses the following key research question: How can the educational potential of magic lantern slides that are scattered in collections across Spain be organized, interpreted and exploited? To make a contribution to solving this problem, the thesis seeks to achieve a twofold objective: (a) to understand the role played by slides in innovations in scientific education for Spaniards at the senior-school level in the first third of the twentieth century; (b) to develop a classification for magic lantern slides that are spread across Spain in order to implement a Web application geared toward educational interpretation of them. To achieve these objectives, this work contains two empirical content-analysis studies of magic lantern slides located throughout Spain. These studies were designed in such a way that their objectives, research questions and expected results were complementary and convergent

[es] Las proyecciones de im?genes acompa?adas de la recitaci?n de textos y la interpretaci?n de melod?as musicales alcanzaron entre la primera mitad del siglo XIX y el primer tercio del XX una importante relevancia socio-cultural en Espa?a. Para sus fines, dichas proyecciones se sirvieron de un nuevo dispositivo tecnol?gico que adopt? denominaciones como ?fantoscopio?, ?megascopio?, ?microscopio solar? o ?linterna de proyecci?n?, y que dio nombre a un medio de comunicaci?n social muy popular conocido bajo el nombre de ?linterna m?gica?. Un medio que ten?a como elemento central un conjunto de placas de proyecci?n habitualmente construidas en vidrio transparente que eran la base de cualquier sesi?n de car?cter p?blico o privado, de orientaci?n instructiva o l?dica. Las placas conten?an im?genes que ilustraban desde f?bulas y cuentos infantiles hasta temas aleg?ricos, c?micos, divulgativos o acontecimientos de actualidad. A pesar de la indudable influencia que tuvo la linterna m?gica en la Espa?a contempor?nea, su presencia en el ?mbito acad?mico como objeto de estudio de car?cter cient?fico siempre ha tenido un papel residual. Afortunadamente, en la actualidad se est? produciendo un cambio de tendencia m?s acorde con su relevancia cultural, en buena medida, gracias a la renovaci?n y el empuje introducido en la ?ltima d?cada por una interdisciplina como la Arqueolog?a de los Medios de Comunicaci?n, impulsada por autores como Zielinski (2008), Hutahmo (2011) o Parikka (2011). Ante el reto de abordar un objeto de estudio tan extenso como la linterna m?gica en Espa?a, la presente tesis doctoral opt? por investigar ?nicamente el potencial did?ctico de las placas de proyecci?n conservadas en Espa?a y por plantear la siguiente problem?tica como centro de la investigaci?n: ?c?mo organizar, interpretar y explotar el potencial did?ctico de las placas de la linterna m?gica diseminadas en los fondos patrimoniales del territorio espa?ol? Para avanzar en la resoluci?n de dicha problem?tica, la tesis plante? alcanzar un doble objetivo general: a) comprender el papel que jugaron las placas en la renovaci?n de la ense?anza cient?fica de los bachilleres espa?oles en el primer tercio del siglo XX; b) desarrollar una clasificaci?n para las placas de linterna m?gica diseminadas en Espa?a que sirva para implementar una ?aplicaci?n web? orientada a su interpretaci?n did?ctica. Para lograr dichos objetivos el presente trabajo ha desarrollado dos estudios emp?ricos de an?lisis de contenido aplicados a las placas de linterna m?gica diseminadas en Espa?a y dise?ados de tal forma que sus objetivos, preguntas de investigaci?n y resultados esperados fueran complementarios y convergentes.