How much does a social worker make? According to the May 2012 records from the Bureau of Labor Statistics, the mean annual healthcare social worker salary is $51,460, or $24.74 per hour. The lowest ten percent earn $31,410, while the top ten percent make an average of $74,030 annually.
The Leibniz Step Reckoner. Gottfried Leibnizâs 1673 âStep Reckonerâ introduced a design innovation that enabled a single gear to represent any digit from 0 to 9 in just one revolution. This stepped-drum approach dominated calculator design for the next two centuries. Gottfried Leibniz.
Did You Know? Experts can't agree on whether Franz Anton Mesmer (1734-1815) was a quack or a genius, but all concede that the late 18th-century physician's name is the source of the word mesmerize. In his day, Mesmer was the toast of Paris, where he enjoyed the support of notables including Queen Marie Antoinette.