4. When Barbarisms are Allowable.

(1)	Dialectic Compositiona—A proper exception to the principle of avoiding foreign and local expres¬sions is found in dialectic composition, where the ob¬ject is to illustrate the peculiarities of speech, or to render a character consistent with his surroundings.
(2)	Teohnioal Persona.—The use of technical terms contributes to clearness and accuracy when they are addressed to those who are familiar with them. The very fact that a word is technical excludes from it a host of irrelevant associations usually conveyed by com¬mon words, and so renders it more precise. Dr. Campbell says of them, "In strict propriety, technical words should not be considered as belonging to the language ; because not in current use, nor understood by the generality even of readers." * Mr. Marsh ob¬serves on the representation of technical characters : "It is better that a character in a play should use professional phrases, by way of indicating his occupa¬tion, than that he should tell the audience in set words I am a merchant, a physician, or a lawyer,' but after
all, considered as a representation 16f the actual lan¬guage of life, it is a violation of t4ith of costume to cram with technical words the conversation of a tech meal man."