THE author of this book is a skilled pathologist, and, therefore, necessarily a practical master of the manipulation of a microscope, at least in the case of transparent objects. He has probably ...

The history of the electron microscope dates back to early twentieth century when the first electromagnetic lens was developed. This opened the door of possibility to use the principles of the lens to ...

THE use of the lantern in one of its many forms has become more and more general. In our younger days it was a great and exceptional treat to see a magic lantern entertainment, but now there are ...