Books are the tools of both teacher and pupil. A library is perhaps the most important adjunct of instruction. It is open to all and is used by all. In every department of science throughout the world the keenest intellects are at work, seeking for solutions to the unending series of problems that present themselves in the physical and natural world. 'Light, more light,' said the dying philosopher, and the longing of the world is but the echo of his last faint cry. To do our duty and to give reply to the many demands made upon us requires all the light and all the experience of other minds, wheresoever they may be found.