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N° 199. myself to my books, I passed six-and-thirty years in searching the treasures of ancient wisdom, but am at last amply recompensed for all my perseverance.

The curiosity of the present race of philosophers, having been long exercised upon electricity, has been lately transferred to magnetism; the qualities of the loadstone have been investigated, if not with much advantage, yet with great applause; and as the highest praise of art is to imitate nature, I hope no man will think the makers of artificial magnets celebrated or reverenced above their deserts.

I have for some time employed myself in the same practice, but with deeper knowledge and more extensive views. While my contemporaries were touching needles and raising weights, or busying themselves with inclination and variation, I have been examining those qualities of magnetism which may be applied to the accommodation and happiness of common life. I have left to inferior understandings the care of conducting the sailor through the hazards of the ocean, and reserved to myself the more difficult and illustrious province of preserving the connubial compact from violation, and setting mankind free for ever from the danger of supposititious children, and the torments of fruitless vigilance and anxious suspicion.

To defraud any man of his due praise is unworthy of a philosopher; I shall therefore openly confess that I owe the first hint of this inestimable secret to the Rabbi Abraham ben Hannase, who, in his treatise of precious stones, has left this account of the magnet:  &c.