National Geographic : 1923 Nov
01 ©Herbert G.Ponting A MULE MARKET According to the U. S. Department of Agriculture, "the ability of the mule to endure hardshipand perform sterling service under adverse conditions has established him as a real asset in American agriculture. In 1910 the number of mulesonfarms and ranches was 4,209,769. The number on January I, 1920, was 5,432,391-an increase during the decade of nearly 30 per cent. Nearly three-fifths ofallthe mules inthe United States are found in the nine cotton-belt States of the South."