ACKNOWLEDGMENTS 



This publication forms the Canadian section of the seventh edition 

 of Scientific and Technical Societies of the United States and Canada — 

 a joint undertaking of the National Academy of Sciences-National 

 Research Council in Washington, and the National Research Council 

 of Canada. 



As a result of this collaboration we have enjoyed, at every stage of 

 the project, the advice and assistance of Mr. John H. Gribbin, Librarian 

 of the National Academy of Sciences-National Research Council, who 

 directed the United States compilation. 



We are indebted, also, to the many scientists and technical officers who 

 supplied the names of new societies, and to the society officers themselves, 

 whose ready cooperation made the work possible. 



Although this edition includes many groups and fields of interest 

 not previously listed, it cannot be regarded as final and complete. The 

 editors therefore welcome any information about societies that could be 

 canvassed for later editions. 



Robert A. Lay 

 Public Relations Office 

 National Research Council 



