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Title: New Developments In Pressure And Differential Transmitters
Author: m. H. Cooper
Source: 1972 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1972
Abstract: Since man first became aware of his environment, he has recognized the possibility of influencing the many variables involved in such a manner as to make his existance more comfortable. Comfort generally has meant that man has developed means of utilizing energy from sources other than his own muscular force to perform work, This work is necessary to provide the food, shelter, and warmth required to insure his survival, This energy has been derived from other animals, water power foss i1 fuels in the form of wood, coal, and oil, and lately from the fundamental forces of atomic nuclei. As man came to recognize that various sources of energy could be used to his benefit, he also became aware that it was necessary to use this energy in a controlled manner. Since he did not understand the forces involved, he ascribed them to beings possessed of supernatural powers. Ri tes and ceremonies were devised in the hope that these ethereal beings might be favorably influenced to release their energy to the benefit of the entreator, while not destroying him in the process. Primitive man attempted to control his environment by occult means so it may be that the first instrument engineers were the priests and medicine men of the ancient religions. A very basic fact was certainly noted as man conducted his first scientific investigations, and it remains fundamental today: before you can control any force, it is necessary to be able to measure it. Extending this statement, it is logical to say that the degree to which any variable can be control led is directly related to the precision with which that variable can be measured.

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