Although slaves had been sold in the American colonies since at least 1619, slave labor did not come to represent a significant proportion of the labor force in any part of North America until the last quarter of the 17th century. After that time, the numbers of slaves grew exponentially.
A Pharmacologist earns an average salary of $103,686 per year. For the first five to ten years in this position, salary increases sharply, but any additional experience does not have a big effect on pay.
Medical and clinical laboratory technologistâs salary can be between $35,000 and $70,000 annually. Technologists who worked in federal government labs earned, on average, $58,000. Those that worked in diagnostic and medical labs and hospitals earned around $50,000.