The foregoing illustrations are briefly stated to prepare the way for a few suggestions respecting some special mechanical contrivances of our language. A general principle in grammar acts as an aggressive and conquering force; it extends its domain, insensibly and gradually, but surely, as far as possible. In an inflectional age a tendency to increase and perfect inflections is discovered; in a flat-construction age the tendency to extend the domain of flat syntax is equally manifest. In our language some constructions are common now, though at one time they were scarcely allowed. This general observation is illustrated in the flat construction of a modifying clause in the nature of a relative pronoun clause. For example, “The man we saw” is a flat construction which has invaded the territory of the relative pronoun. The sentence is cut down from “the men _whom_ we saw.” Very little study has been given to these encroachments and conquests; but they will amply reward the careful student of them. The flat construction in the province of the relative is one of our devices for reducing the use of _who_, _which_, _whose_, _whom_ and _that_. These words occur so frequently in the speech and on the printed page that we have quite unconsciously gone about reducing their importance, and the results are so considerable as to merit special attention. I have made some comparative studies, having for their object something like accurate measurement of the change in the use of this class of pronouns, since the year 1611, the date of the English Bible of King James. Two great changes are easily discovered. (1) The number of relative pronouns on a page has been reduced, on an average, about one half. (2) The word _that_ has been almost pushed out of the relative office. The devices by which the use of relatives has been rendered unnecessary, are generally forms of the flat construction. The ousting of _that_ from relative functions has been promoted by the unconscious effort to dispense with the excessive repetition of the word. When used as a conjunction, a demonstrative and a relative, its repetition becomes tiresome to both writer and reader. A careful study will show that present English employs _that_ very seldom as a relative, and much less frequently than the English of the last century employed it as a connective and a demonstrative. In the case of _that_ we see the operation of a principle in architectural criticism. If a particular architectural device becomes common, it becomes unfashionable. Its frequency offends the taste and the offense is punished by a change. Forty years ago the ordinary Greek column was used on small private dwellings in many sections of this country. It became so disagreeable to our taste that this column was for some time nearly out of use in public buildings. _That_ is, like any piece in architecture, made so common as to become unconsciously offensive. The fact brings out a