application or intradermal injection of a substance to the skin to test the body's reaction to it. Such a test detects an animal's sensitivity to such allergens as dust and pollen, or to preparations of microorganisms believed to be the cause of a disorder.
A direct relationship graph is a graph where one variable either increases or decreases along with the other. The general equation for a direct relationship graph is y = mx + b, where y denotes the...
The direct relationship of labor to its products is the relationship of the worker to the objects of his production. The relationship of the rich man to the objects of production and to production itself is only a consequence of this first relationship, and confirms it. Later, we shall consider this second aspect.