P R E F A T O R Y N O T E T O T H E S Y M P O S l U M

THE present Symposium published in commemoration of the Sixtieth Birthday of Sir C. V. Raman consists of twenty-nine papers dealing with various aspects of the subiect of Crystal Physics. Shortness of time stood in the way of its being made more fully representative and the range of topics dealt with in it more comprehensive. That ir has been possible to include a few contributions by distinguished investigators in other countries is due to the great kindness of these authors in responding to the invitation of the Council in spite of the extremely short notice given to them. Professors Forrest F. Cleveland, R. Bowling Barnes, N. F. Mott, Linus Pauling, C. Manneback, Robert Hoftstadter, R. W. G. Wycoff and Geo. Glockler, who were invited to contribute but were unable to send papers, have sent very kind messages conveying their good wishes and felicitations. To them and to all those who have contributed to the Symposium, the Council wish to express their grateful thanks.

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