of aspecialized calling conspired together. All the eulogistic connotations that gather about "truth" were called into play. Thus "science," meaning physical knowledge, became a kind of sanctuary. Areligious atmosphere, not to say an idola- trous one, was created. "Science" was set apart jits findings were supposed to have aprivileged relation to the real. In fact, the painter may know colors as well as the physicist} the poet may know stars, rain and clouds as well as the meteorolo- gist jthe statesman, educator and dramatist may know human nature as truly as the professional psychologist} the farmer may know soils and plants as truly as the botanist and min- erologist. For the criterion of knowledge lies in the method used to secure consequences and not in metaphysical concep- tions of the nature of the real. Nevertheless in the end think- ers in all lines are dependent upon the mathematician and the physical inquirer for perfecting of the tools employed in their respective callings. That "knowledge" has many meanings follows from the operational definition of conceptions. There are as many con- ceptions of knowledge as there are distinctive operations by which problematic situations are resolved.