Cod liver oil was considered highly valuable for its healing characteristics, as well as for giving increased strength and energy. Not only was the oil consumed, but it was also rubbed on sore joints and muscles to provide some relief. It was claimed to cure gout and rickets, among other illnesses. By the time the mid 1700s rolled around, it was also used in lamp oil, soap, paint, and leather tanning. Cod liver oil consumption reached its height in the first half of the 20th century all over the world.
Some detergents barely work at all for making bubbles while others work great. Detergent is a key ingredient in most do-it-yourself bubble juice recipes. The detergent is usually of the type called dishwashing liquid in the U.S. or washing-up liquid in the UK. These are the types of detergents used for hand washing dishes. Strength. Detergent strength varies considerably from detergent type to detergent type.
Originally Answered: Why does soap create bubbles? The reason some liquids mix while others don't has to do with the polarity of the molecules. Polar molecules will make hydrogen bonds with each other, apolar molecules don't. When a polar and an apolar liquid are mixed the polar molecules will make hydrogen bonds and stick together. This will separate them from the apolar liquid. Examples of polar liquids are water and ethanol (alcohol). Oils are examples of apolar liquids. Water and alcohol mix, water and oil doesn't. So how does soap clean oils? Let's look at the molecule structure of a soap: