THE term 'Introduction' applied to a text-book on a branch of physics gives little idea of the standard and scope of the work. Those who are familiar with the customary method of teaching optics will ...

PROF. SCHUSTER has done excellent service to teachers and students alike by publishing this book, which fills a very obvious gap. It is an introduction to the theory, and purposely does not deal with ...

It's Christmas Eve and we are going to go celebrate being young and being alive.