The Practical Astronomer

The Practical Astronomer

Light is that invisible etherial matter which renders objects perceptible by the visual organs. It appears to be distributed throughout the immensity of the universe, and is essentially requisite to the enjoyment of every rank of perceptive existence. It is by the...
Europe in the Middle Ages

Europe in the Middle Ages

The history of Mediaeval Europe is so vast a subject that the attempt to deal with it in a small compass must entail either severe compression or what may appear at first sight reckless omission.The path of compression has been trodden many times, as in J. H....