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 Clinical Laboratory Technician Pay vs. Other Best Jobs. Bringing in an average salary of $40,750 in 2014, clinical lab technicians earned much less than pharmacists ($118,470), physical therapists ($83,940) and registered nurses ($69,790). But clinical laboratory technicians made more than medical assistants ($31,220) and paramedics ($35,110) in 2014.