_Insane Asylum_. Obviously an asylum cannot be unsound in mind. Say,
asylum for the insane.

_In Spite of_. In most instances it is better to say despite.

_Inside of_. Omit the preposition.

_Insignificant_ for _Trivial_, or _Small_. Insignificant means not
signifying anything, and should be used only in contrast, expressed or
implied, with something that is important for what it implies. The
bear's tail may be insignificant to a naturalist tracing the animal's
descent from an earlier species, but to the rest of us, not concerned
with the matter, it is merely small.

_Insoluble_ for _Unsolvable_. Use the former word for material
substances, the latter for problems.

_Inst._, _Prox._, _Ult._ These abbreviations of _instante mense_ (in
the present month), _proximo mense_ (in the next month) and _ultimo
mense_ (in the last month), are serviceable enough in commercial
correspondence, but, like A.M., P.M. and many other contractions of
Latin words, could profitably be spared from literature.

_Integrity_ for _Honesty_. The word means entireness, wholeness. It
may be rightly used to affirm possession of all the virtues, that is,
unity of moral character.

_Involve_ for _Entail_. "Proof of the charges will involve his
dismissal." Not at all; it will entail it. To involve is, literally,
to infold, not to bring about, nor cause to ensue. An unofficial