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.
Male professors at Boston University make on average $162,972 over the course of nine months, the typical contract for an academic year. This is $109,870 more than the average male university professor's nine month salary ($53,102).n 2013 professors at Boston University had an effective annual salary of $212,680. This is $5,584 more than professors earned in 2012, the most recently reported prior year, and a 2.6 percent increase in effective annual salary over the previous year's average annual salary ($207,096).