We shall be glad to supply additional copies of this slip upon request—we desire the largest number of replies possible and it is hoped the scientific interest of the subject will lead you to aid us in procuring them. Age Weight Height Health Married? Do you sleep well? How many waking hours in bed? How many hours’ sleep on an average, and at what times? What do you consider sufficient for yourself? Any difference during vacations? Do you use any means or devices for inducing sleep? Similar observations on members of your family, if any? Are your dreams usually rational or fantastic, pleasant or unpleasant? Do you have nightmare? Are you given to worry? Does physical, especially agricultural, work relieve this? Do you take artificial exercise, or does your work involve exercise? Appetite good? Simple diet or elaborate? Is the “sleep of the laboring man sweet” in reality? Name Profession Address No scientifically complete tabulation and study of data has yet been made on SLEEP. Moffat, Yard & Company is publishing a book entitled “The Gift of Sleep,” by Bolton Hall. For the purpose of this book it is desired to obtain full information concerning the amount of sleep needed by individuals in different walks of life, the circumstances under which the soundest and most restful sleep is obtained, and the amount necessary for individuals. You will confer a great favor if you will fill out this sheet and return to the publisher. Yours very truly, MOFFAT, YARD & COMPANY, 31 East Seventeenth Street, New York. ADDITIONAL REMARKS At the date of going to press we have not received answers sufficient in number to warrant very definite statements in regard to sleep and dreams. A thorough report must be reserved for a later edition. Nor was the time sufficient for the very considerable labor of examining and tabulating the replies. It appears, however, that about one person in thirty regards himself as a poor sleeper, and only two others in thirty will say they sleep only fairly well. About three persons out of five report that they spend no time in wakefulness in bed; the remaining two persons spend from fifteen minutes to five or six hours each, the average among this group being one hour and ten minutes per person per night. Among professors in our leading universities the prevailing hour for retiring is between 10 and 11 o’clock; four-fifths of this group say they retire either at 10, 10.30, or 11 o’clock; but this class of people retire on the average about one-half hour later than persons of the other classes from whom we have received replies. The average duration of sleep is, roughly, seven and one-half hours. One-third of all replies gave eight hours as the length of sleep; and the professors are inclined to sleep a slightly longer period than those in the other occupations taken together.