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[4] [5] The mouthful was still a unit of liquid measure during Elizabethan times. [6] The principal Egyptian standards from small to large were the ro, hin, hekat , and khar.) [ 7 ] Because of the lack of official definitions, many of these units will not have a consistent value.
Before standardization on specific gravity around the time of World War II the Baumé scale was generally used in industrial chemistry and pharmacology for the measurement of density of liquids. Today the Baumé scale is still used in various industries such as sugar beet processing , ophthalmics, starch industry, winemaking, industrial water ...
Volume may be measured either in terms of units of cubic length or with specific volume units. The units of cubic length (the cubic inch, cubic foot, cubic mile, etc.) are the same in the imperial and US customary systems, but they differ in their specific units of volume (the bushel, gallon, fluid ounce, etc.).
Today, most of the world prefers metric measurement by weight, [3] though the preference for volume measurements continues among home cooks in the United States [4] [5] and the rest of North America. Different ingredients are measured in different ways: Liquid ingredients are generally measured by volume worldwide.
The general standard for liquids is 31.5 gal or half a hogshead. The common 55-gallon size of drum for storing and transporting various products and wastes is sometimes confused with a barrel, though it is not a standard measure. In the U.S., single servings of beverages are usually measured in fluid ounces.
A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl., old forms ℥, fl ℥, f℥, ƒ ℥) is a unit of volume (also called capacity) typically used for measuring liquids. The British Imperial , the United States customary , and the United States food labeling fluid ounce are the three that are still in common use, although various definitions ...
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The oldest way to roughly measure a volume of an object is using the human body, such as using hand size and pinches. However, the human body's variations make it extremely unreliable. A better way to measure volume is to use roughly consistent and durable containers found in nature, such as gourds, sheep or pig stomachs, and bladders.