The chromium fixes the copper and arsenic to the wood. CCA can be separated into Type A, B, or C depending upon the relative proportions of metals (table I-1). The relative proportions range from 35-65%, 16-45%, 18-20% for chromium, arsenic, and copper, respectively.
The Civil Rights Act of 1964 ended racial segregation and outlawed most forms of discrimination in the workplace, schools, public facilities and separate requirements based on racialized distinctions, such as discriminatory voter registration requirements. The Civil Rights Act also clarified some of the rights of women.
Jim Crow laws were state and local laws enforcing racial segregation in the Southern United States. Enacted after the Reconstruction period, these laws continued in force until 1965.They mandated de jure racial segregation in all public facilities in states of the former Confederate States of America, starting in 1890 with a  separate but equal  status for African Americans.enerally, the remaining Jim Crow laws were overruled by the Civil Rights Act of 1964 and the Voting Rights Act of 1965, but years of action and court challenges were needed to unravel numerous means of institutional discrimination.