Every profession or trade every art and every science has its technical vocabulary the function of which is partly to designate things or processes which have no name in ordinary English and partly to secure greater exactness in nomenculture. Such special dialects and jargons are necessary understood by the devotes of the particular science or art. They have the precision of a more economical to name a process than to describe it. Thousands of these technical terms are very properly included in very large dictionary, Yet as a whole they are rather on the outskirts of the English language than actually within its borders. Different occupations however, differ widely in the character of their special vocabularies.