_Mother_. E's mother was a qualified physician and a specialist in bacteriology. For some years she held a position as bacteriologist in one of the municipal departments of New York City. After the birth of her son she devoted a great deal of attention to his education and welfare, keeping records of his development, supervising his health, and acting as his teacher. She often accompanied him to school, sometimes registered for courses along with him, or herself took courses calculated to make her more useful in his training. She gave an exceptional amount of attention to his formal educational program and cultivated with him numerous extracurricular intellectual activities. During E's college career the two were often seen together on the campus. EARLY HISTORY [5] E was his parents' fourth child, three girls having been born before him, all having died. Birth was difficult. He was bottle fed. His parents were both in middle life at the time of his birth. He cut his first tooth at 8 months--a lateral incisor. He walked at thirteen months. Up to the age of 2 years E did not say a word. He then began to talk, and before he was 3 years old was able to read such books as _Peter Rabbit_. Conversation with him was carried on in German, French, Italian, and English equally. When he did begin to talk he could say in these four languages all the words he knew. _Health_. E's health has been exceptionally good from infancy. He has had no disorders or diseases except measles, and an occasional attack of indigestion. He is exceptionally free from colds. _Physical measurements_. The figures given below as _averages_ are for a boy of 8 years 4 months who is the same height as E. The average height for a boy of this age is 49.7 inches. The measurements here given for E were transcribed from the gymnasium records of the school he was then attending. CHILD E AVERAGE FOR MEASUREMENTS OCTOBER AGE 8 YEARS 4 MONTHS 30, 1916 AT HEIGHT 54.3 INCHES Weight 89.3 pounds 70.5 pounds Height 54.3 inches 54.3 pounds Girth of chest 31.8 inches 25.6 inches Girth of chest, expanded 32.4 inches 26.8 inches Lung capacity 100 cubic inches 112.0 cubic inches Strength, right forearm 30.9 pounds 39.7 pounds Strength, left forearm 22.0 pounds 37.5 pounds It will thus be seen that E is considerably larger than the average boy of his age, though of less lung capacity and forearm strength. _Other characteristics_. E has clear, well-molded features. He does not like physical exercise of any kind but has had special attention along this line, such as lessons in swimming, dancing, and horseback riding. He sleeps eleven hours and goes to sleep immediately upon going to bed.