History and extraction [edit]. The name tea tree is used for several plants, mostly from Australia and New Zealand, from the family Myrtaceae, related to the myrtle.The use of the name probably originated from Captain Cook 's description of one of these shrubs, that he used to make an infusion, to drink in place of tea.ea tree oil is toxic when taken by mouth, but is widely used in low concentrations in cosmetics and skin washes. Tea tree oil has been claimed to be useful for treating a wide variety of medical conditions.
While the average beginning salary for industrial-organizational psychologists with a masterâs degree is about $50,000, experienced industrial-organizational psychologists with a doctorate degree can earn up to $250,000 per year.owever, more and more school psychologists are earning doctorate degrees in psychology (PhD, PsyD or EdD). In addition to an advanced degree, many schools also require the completion of a 60-credit school psychology specialist program.
To earn this amount, a doctorate is typically required. Experimental or Research Psychologists: The average salary averages between $90,690 and $91,980 if employed in individual and family services or educational and support services. An experimental psychology doctoral degree is required for most positions.rivate practice psychologists typically earn more than professionals working in hospitals or government environments, but both professionals have the opportunity to earn a significant portion. The average salary in 2010 was $68,640 according to BLS.gov. Currently, the median income of a psychologist is $82,877.