1. Supplied by E. W. Blanchard, Ph.D., Director of Research, Schieffelin and Company, New York.
2. A new mydriatic and cycloplegic drug: Compound 75 GT;Priestley;Am. J. Ophth.,1951
3. Personal communication from Schieffelin and Company.
4. Personal communication.3
5. Soon available under the trade name; Cyclogyl.