The weight of the human body was the working standard. This culture of weights and the measures, and the measurements for comparison to a standard of linear measure, were based on dimensions of part of the human body. Antropomtrico, primitive, but, natural, accessible the system to any individual, of easy comparison, manuscript and transport, was the proper one measured of the man. This culture of the metrologia reflected the necessity of the man in understanding the world, becoming related with the groups and its entorno (localization space-time), taking it to establish it comparison standards. To measure is proper of the nature human being 24 and the transmission of the knowledge of the measurement (verbal, comment, experimentation), acquired for self-knowledge and characteristic of the common sense, were a necessity for its survival. The self-knowledge is scientific knowledge that I eat such consists in the common sense 25. The accepted common sense what it exists as well as such is. The common sense has its properties and can detach that it does not result of one practical one directed and if reproduces with the development of daily and the experiences of life of a social group, of spontaneous form.
Thus it is confirmed in history, the knowledge acquired in existential, practical, objective, superficial the metrologia, and persuasivo. Perhaps for the metrologia to identify itself with this way of knowledge is that it always was, although its constant participation in the progress in all sciences, considered only one practical one in the field of natural sciences. It is said, however that after-modern science considers the science of the common sense, that one that produces technology, and that as well as the knowledge if it translates self-knowledge, technological development must be expressed life wisdom. Perhaps either this the perspective for the future, a time that still we are in a period of transistion.