to distinguish between the ripe and the unripe berries in the garden, he
finds this knowledge of service in the community, or home, life, since
it enables him to distinguish the fruit his mother may desire for use
in the home. One mark of social efficiency, therefore, is to possess
knowledge that will enable us to serve effectively in society.

=B. Skill, a Factor in Social Efficiency.=--In the sphere of action,
also, the child might acquire skill in making stones skip over the
surface of the lake. Here, again, however, the acquired skill would
serve no purpose in the community life, except perhaps occasionally to
enable him to amuse himself or his fellows. When, on the other hand, he
acquires skill in various home occupations, as opening and closing the
gates, attending to the furnace, harnessing and driving the horse, or
playing a musical instrument, he finds that this skill enables him in
some measure to serve in the community life of which he is a member. A
second factor in social efficiency, therefore, is the possession of such
skill as will enable us to co-operate effectively within our social
environment.

=C. Right Feeling, a Factor in Social Efficiency.=--But granting the
possession of adequate knowledge and skill, a man may yet fall far short
of the socially efficient life. The machinist, for instance, may know
fully all that pertains to the making of an excellent engine for the
intended steamboat. He may further possess the skill necessary to its
actual construction. But through indifference or a desire for selfish
gain, this man may build for the vessel an engine which later, through
its poor construction, causes the loss of the ship and its crew. A third
necessary requisite in social efficiency, therefore, is the possession
of a sense of duty which compels us to use our knowledge and skill with
full regard to the feelings and rights of others. Thus a certain amount