Electricity and its uses

John Munro (1849���1930) fue un escritor brit��nico especializado en difundir la historia de la electricidad y en promover los usos comerciales de la misma. En 1881, cuando fue impreso este libro, a��n estaban patent��ndose las primeras bombillas incandescentes de uso comercial por el brit��nico Joseph Swan y por su competidor norteamericano Thomas Edison. De hecho, s��lo hasta 1882, un a��o despu��s de la publicaci��n de este libro, inici�� el proceso de iluminaci��n de las calles y las casas de Londres con la fundaci��n de la "Edison & Swan United Co���, una compa����a resultante de los litigios entre Edison y Swan.

The acquisition of expository uses of language

Objective: This study offers a description of the kinds of linguistic aids offered by adults while giving explanations to young children about different issues. During the midst of these conversations children have several opportunities to learn, not only from objects and events, but also from the utterances used to refer to them, learning how realities are named after, and in many cases, how to participate in them. Methodology: Through the analysis of eleven minutes of interaction between young child and his maternal grandparents. Results: Adults offers young child different discursive ways for helping him to add information, organize and clarify the topic that he is talking about. Conclusions: The results allow to identify different ways that the adults use for helping young child to improve his explanations.