There is not a home, office, factory, or place of business of any kind that does not actually need this book. It is a money saver and a money maker; it appeals to the young as well as to the old. Great business enterprises allow their success to the manufacture or sale of some simple invention or compound—usually the result of an experiment at home. With this latest book of practical formulas the boy of to-day has a far better opportunity than his father—and the mother and sisters can develop an industry of their own that will produce a comfortable income.

We live in the most progressive country on the face of the earth. We owe it to ourselves to advance—to learn—to progress. We can't afford to stand still. Then learn more, so you can earn more. Profit by the knowledge that has made others successful. Now is the time-you can't learn younger. Get this book at once.

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