ABSTRACT
In discussing the problem of interpretation, Blalock stresses that the distance between "main or general" theories and "auxiliary" theories cannot be closed by logic alone, "instead, a correspondence between two concepts, one in each language, must be established by common agreement or a priori assumption". The instruments whereby observations are made are divisible into two general classes involving human sensory organs unaugmented by technologies other than skill; and technologically augmented sensory organs. Technological augmentation of the senses seems to be a general trend in all sciences as the people seek, more and more, to make observations on phenomena that are not immediately available to an observer's senses and to raise the precision of all our observations. Finally, in addition to specifying observable indicators of abstract concepts, devising or selecting appropriate instruments with which these indicators are to be observed.
