ACKNOWLEDGMENTS.
It is with pleasure that we acknowledge our indebtedness to the many persons who have assisted us in collecting the data for this work.
About two hundred tests upon normal subjects were made for us by the following persons: Dr. Frederic Lyman Wells, Dr. Jennie A. Dean, Miss Lillian Rosanoff, and Miss Madeleine Wehle.
Dr. O. M. Dewing, the late superintendent of the Long Island State Hospital, and Dr. Chas. W. Pilgrim, superintendent of the Hudson River State Hospital, have assisted the work by kindly permitting the test to be made upon employees of these institutions, and we are especially indebted to Dr. F. W. Parsons for personal assistance in securing the co-operation of many subjects.
Professor R. S. Woodworth, of Columbia University, extended to us the courtesy of the Psychological Laboratory during several weeks of the summer session of 1909, and gave us much assistance in obtaining interviews with students; we received assistance also from several of the instructors of Teachers' College, especially Mr. Wm. H. Noyes.
We are indebted to Mr. F.C. Lewis and Mr. W.E. Stark, of the Ethical Culture School, New York, for permitting us to make the test upon the pupils of that school.
In the work of compiling the tables we have been assisted by Dr. N.
W. Bartram, Dr. Jennie A. Dean, Mrs. H. M. Kent, and others.
We wish, finally, to express our thanks to Dr. Wm. Austin Macy, superintendent of this hospital, to whom we are indebted for the opportunity of undertaking this work.