"... Even minor during the growing period may prevent full potential growth from being attained. ... Growth potential is not a thing that can be speeded up and lowed down and still obtain the same end results. According to ..., if one does not use the full potential alI the way along, one does not achieve full development. The same ultimate weight may be reached but not the ideal shape and composition. If the rate of growth is sufficiently slowed down, the adult is not only smalI but under-developed with normal or nearly normal head size, moderately retarded trunk and relatively short legs."