What Are burst cylinders?
(That were apart of the Colt Walker pistol)

A burst/rupture disc is a feature installed on the valve of a cylinder allowing gas to escape in the event of a rapid expansion of the gas stored within a cylinder. Since it is unlikely that someone will be around in the event of a fire to open the valve to vent the gas, something needs to allow the gas to escape prior to the cylinder rupturing.

Explanation:

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation: