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.
Average National Salary. According to data collected by the Bureau of Labor Statistics in May 2011, medical and clinical laboratory scientists throughout the United States earned an average salary of $58,120 per year.Half of workers in this occupation reported annual salaries between $48,000 and $68,500.s of 2011, more than half of all medical and clinical lab scientists were employed by general hospitals and earned an average salary of about $58,500 per year. Those working in medical and diagnostic laboratories reported similar average salaries.