These things I mention as a caution to young printers, and that they may be encouraged not to pollute their presses and disgrace their profession by such infamous practices, but refuse steadily, as they may see by my example that such a course of conduct will not, on the whole, be injurious to their interests.
There are no more uses of "injurious" in the book.
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The belief is not only foolish, but potentially injurious.
altogether he assured me that it would be excessively troublesome, injurious, and unsafe.