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Navigation Act & Other "Abominable" Acts

Before the American colonies declared their independence in 1776, England (later, Great Britain) passed many laws limiting trade and manufacturing in its colonies.   The purpose was to protect English businesses and Crown wealth under an economic policy known as mercantilism.   This policy protected English manufactures from competition by manufacturers in its colonies, which were allowed to produce only raw materials or partly finished goods for manufacture in Great Britain.   The policy also created a favorable trade balance so that the value of goods exported from England was higher than those imported, so that the English government accumulated gold; that is, it became wealthy.   The laws passed under this policy collectively are known as the Navigation Acts and can be summarized as follows:

  • Goods imported and exported into the American colonies must use English ships;
  • Ship's crews must be at least 3/4 English or colonial;
  • The colonies could export certain goods, the so-called "enumerated goods" only to England;
  • Most colonial goods had to be unloaded in English ports.

On October 30, 1650, the English Parliament enacted laws that required foreign ships to obtain licenses to trade with the American colonies.   The purpose of these actions was to reduce the very competitive Dutch supremacy in ocean trade.   Later, on October 9, 1651, Parliament ruled that imports from the American colonies must be in English ships and from points of production.   This law, known as the first (one of a series) Navigation Act, caused problems for American exporters and English importers because England did not have enough ships for the trade.   Irate colonists insisted on trade freedom and continued to use Dutch ships.

In October, 1660, an expanded Navigation Act was enacted.   This act required trade with the American colonies to be in English-built and -owned ships with crews composed of at least 3/4 Englishmen.   Also, enumerated colonial goods, such as indigo, sugar, cotton, wool, ginger, and tobacco could be shipped only to England.

On July 27, 1663, the second Navigation Act was enacted to provide that all imports to the American colonies with the exception of salt, wine, servants, horses, etc., from other countries must be transported from England in English ships.

In 1699, to protect its wool industry, the English Parliament passed the Wool Act that limited wool production in Ireland and forbade wool export from American colonies.

In 1705, Parliament passed a trade act that expanded the number of colonial products that were to be exported only to English ports: rice, molasses and naval stores (pitch, tar, rosin, turpentine and hemp).   Parliament also added bounties (subsidies) for the export of naval stores from the colonies.

In 1729, the British Parliament renewed its bounties (subsidies) on naval stores: pitch, tar, rosin, turpentine, hemp, masts, yards and bowsprits exported from the colonies. These bounties continued to 1774, but the hemp bounty lapsed in 1741, and was reinstated in 1764.

On May 17, 1733, Parliament passed the Molasses Act, which posted large duties on all molasses, rum and sugar imported to the American colonies from non-British Caribbean Islands.   This Act attempted to force American traders to buy higher cost sugar and molasses from British Caribbean planters rather than lower cost sugar and molasses provided by French and Dutch Caribbean planters.

On May 13, 1748, Parliament enacted a bounty (subsidy) of six pence per pound on indigo imported from the American colonies.

In 1750, Parliament enacted the Iron Act, which forbade the construction of rolling and sheeting mills, steel furnaces and tilt-hammer forges in the American colonies.   This legislation also allows duty-free export of colonial pig and bar iron into Great Britain under specified conditions.   The purpose of this legislation was to prevent the colonies from competing with British iron manufacturers and encourage the export of raw iron products from the colonies. Schles 90

In 1763, Parliament reduced the bounties (subsidies) on indigo, a staple crop of the southern colonies.   Indigo is a dye used in the British woolen textile industry.

On April 5, 1764, Parliament enacted the American Revenue Act, known in the colonies as the Sugar Act.   While earlier acts were designed to protect British manufacturers against American competition, the purpose of this act was to raise revenue for the British government to defray its large debt incurred by the French & Indian War that ended in 1763.   The Sugar Act imposed new and higher duties on many American exports and foreign refined sugar.   It also doubled the duties on foreign goods re-shipped to the colonies from Great Britain.   This act and other enacted at the same time are collectively known as the Grenville Acts, after British Chancellor of the Exchequer, Lord Grenville.   One of these acts also reorganized the customs laws so that trade laws could be enforced more effectively.   For example, the vice admiralty court was located at Halifax, Nova Scotia with jurisdiction over all the American colonies.

The Navigation Acts were repealed in 1849.


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