Raw Materials. The main component of brass is copper. The amount of copper varies between 55% and 95% by weight depending on the type of brass and its intended use. Brasses containing a high percentage of copper are made from electrically refined copper that is at least 99.3% pure to minimize the amount of other materials.
Principal Scientist in Boston, Massachusetts Salary. A Principal Scientist in Boston, Massachusetts earns an average salary of $123,925 per year.
Research Assistant Cambridge, MA Salary. Research Assistant Cambridge, MA average salary is $83,133, median salary is $76,000 with a salary range from $28,450 to $780,000. Research Assistant Cambridge, MA salaries are collected from government agencies and companies. Each salary is associated with a real job position.