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.
It is a fast-growing field, and there will be great demand for clinical laboratory professionals in the future. Typically, medical laboratory technicians earn an average salary of $45,000 to $50,000 per year, while the average for medical laboratory scientists is between $55,00 to $60,000 per year.