Practical Gemology refers to the application of the knowledge of characteristics and properties of gemstones in identification or separation of synthetics and imitations. Diamond grading is included in practical gemology.
In November 1919 and January 1920, in what notoriously became known as the âPalmer Raids,â Attorney General Mitchell Palmer began rounding up and deporting so-called radicals. Thousands of people were arrested without warrants and without regard to constitutional protections against unlawful search and seizure.
John Brown's Raid. Harper's Ferry before John Brown's raid on October 16, 1859. On October 16, 1859, John Brown led a small army of 18 men into the small town of Harper's Ferry, Virginia. His plan was to instigate a major slave rebellion in the South.