Examlex
If the magnification of a mirror or lens is negative,it means that
Nineteenth Century
The period from January 1, 1801, through December 31, 1900, marking the 19th century of the Gregorian calendar, known for significant cultural, technological, and political changes.
American Federation
An organization or association formed for a specific purpose, potentially referring to labor, political, or other types of federations in the United States.
Samuel Gompers
An influential labor union leader who founded the American Federation of Labor (AFL) and played a key role in advocating for workers' rights in the late 19th and early 20th centuries.
Haymarket Bombing
A pivotal event in Chicago in 1886, where a bomb detonated during a labor rally, leading to riots and a trial that highlighted issues of workers' rights and law enforcement tactics.
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