Our immediate interests are after all of but small moment. It is what we do for the future, what we add to the sum of man’s knowledge, that counts most. As someone has said, ‘The...

The valuable attributes of research men are conscious ignorance and active curiosity.

Necessity is not the mother of invention. Knowledge and experiment are its parents. It sometimes happens that successful search is made for unknown materials to fill well-recognized and predetermined requirements. It more often happens that...