ACKNOWLEDGMENTS
The author wishes to express his gratitude for the constant and invaluable assistance of Prof. W. R. Smythe, under whose direction the following work was done. Credit and thanks are also due to Prof. H. V. Neher, Mr. Frank Silhavy, the staff of the Mount Wilson Observatory, and others too numerous to mention. The author wishes to express special appreciation to Mr. W. T. Ogier and Mr. John Lauritzen. Much of what follows is due to them, and they are in a unique position to know what the following pages represent in terms of human values.
Finally, appreciation must be expressed to the Office of Naval Research, for providing the funds which made this work possible.
