For example, the average age of the onset of menstrual periods in girls was 15 in 1900. By the 1990s, this average had dropped to 12 and a half years of age.uberty facts. 1  Puberty is the period of sexual maturation and achievement of fertility. 2  The time when puberty begins varies greatly among individuals; however, puberty usually occurs in girls between the ages of 10 and 14 and between the ages of 12 and 16 in boys.
Herbert Hoover was the president of the U.S. when the great depression began in 1929.
Franklin D. Roosevelt was governor of New York, when the Wall Street Crash in October 1929, created the worst depression in American history. Roosevelt made strenuous attempts to help those without work. He set up the New York State Emergency Relief Commission and appointed the respected Harry Hopkins to run the agency.oosevelt's first act as president was to deal with the country's banking crisis. Since the beginning of the depression, a fifth of all banks had been forced to close. As a consequence, around 15% of people's life-savings had been lost.