Letter from Carrie Gold to MR Yung S Liu, General Electric, Research and Development, Building K-1, Room 4B28, PO Box 8, Schenectady, New York Thanks him for his invitation to Professor Gold to lecture to the local chapter of the Optical Society next spring. Professor Gold does not have any plans for travelling to Liu's area then, and he asked her to write to say that he will let Liu know if a trip at that time becomes possible. 28 November 1978