I think it is the Microscope. Robert Hooke was a scientist who came up with the law of elasticity, the Hooke's law as well his pioneering work using the microscope to document observations of a variety of samples in his book. Hook published a book Micrographia, an accurate and detailed record of his observations through his microscope.
This would be Majority Leader.
Hope this helps!
<3
Answer:
the us had a policy of appeasement
Schools in the United States started integrating in the 1950's as a direct result of the Brown v Board of Education Supreme Court ruling.
