Technology+&+Science

__**Technology**__ One of the most unique inventions of the 1920s was the lie detector. Lie detectors were used in interrogating suspected criminals. Lie detectors utilize sensors placed on the test subject to record respiration, heart rate, blood pressure, and galvanic skin response, or moisture in the fingertips. Taken together under highly controlled interview conditions and interpreted by an expert, the results of such measurements may indicate an attempt to deceive. (“police”) Using the lie detector was overall unfair to the suspects. The invention showed a lack of consistency in its use.

[[image:images.jpg caption="simpson lie detection takes place"]]
A not so perfect invention had a new start in the 1920s. Refrigeration was taken to the next level when harmful ammonia was replaced with Freon. ( “refrigeration”) Keeping food and other perishable items cold and was a massive triumph. People spent less money, because food would last longer and would not spoil as fast. Generally, refrigerators were sold quickly as a necessity for everyone.

**__Science__**
An incredible occurrence in medicine happened in 1928. Alexander Fleming noticed the inhibitory action of a stray mold on a plate culture of staphylococcus bacteria in his laboratory at St. Mary's Hospital, London. Fleming was the only one to notice the possible implications of the mold. The mold was a strain of Penicillium which gave its name to the now-famous drug penicillin. (“medicine, history of.”) Penicillin is widely used for almost any sickness. It’s strange how people can use mold to cure common illnesses. Fleming served a big part in the advancement of medicine.

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