The purpose of the Fugitive Slave Law was to Prevent slaves from testifying against whites in court trials.
Require slaves to have citizenship papers in order to obtain jobs.
O Prevent slaves from having group gatherings or meetings.
Require the return of runaway slaves to their owners.

Explanation:

During the course of the slave trade, millions of Africans became involuntary immigrants to the New World. Some African captives resisted enslavement by fleeing from slave forts on the West African coast. Others mutinied on board slave trading vessels, or cast themselves into the ocean. In the New World there were those who ran away from their owners, ran away among the Indians, formed maroon societies, revolted, feigned sickness, or participated in work slow downs. Some sought and succeeded in gaining liberty through various legal means such as “good service” to their masters, self-purchase, or military service. Still others seemingly acquiesced and learned to survive in servitude.

The European, American, and African slave traders engaged in the lucrative trade in humans, and the politicians and businessmen who supported them, did not intend to put into motion a chain of events that would motivate the captives and their descendants to fight for full citizenship in the United States of America. But they did. When Thomas Jefferson penned the words, “All men are created equal,” he could not possibly have envisioned how literally his own slaves and others would take his words. African Americans repeatedly questioned how their owners could consider themselves noble in their own fight for independence from England while simultaneously believing that it was wrong for slaves to do the same.

This exhibit explores the methods used by Africans and their American-born descendants to resist enslavement, as well as to demand emancipation and full participation in American society. Strategies varied, but the goal remained unchanged: freedom and equality.

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uses : -

1.aneroid barometers primarily measure whether pressure is rising or falling.

2.aneroid barometers are often used for reading pressure in homes and recreational boats.  

3.other uses may include barographs in meteorology and altimeters in modern aircraft.  

4.this type of barometer can announce whether a high or low pressure system is coming or whether it is becoming more intense.  

5.there are different types of aneroid barometers, such as the altimeter, which measures altitude, or distance above sea level.  

6.another example is a barograph, which is a modified aneroid barometer that provides constant readings of atmospheric pressure on graph paper.  

7.when used in this capacity, the aneroid barometer can store a week's worth of data.

android diameter a device for measuring atmospheric pressure , often specially calibrated for use as an altimeter ,consisting of a box or chamber partially exhaused of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air

refer to the attachment for the characteristics : -