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I persuaded myself that I could give nothing more pleasing to Your Highnesses original: "Cels: V:", an abbreviation for Celsitudinibus Vestris than this new work of this Natural Science—an art most ancient and venerable, yet marvelous and utterly essential. It is a work, I say, of the utmost curiosity In this context, "curious" implies something highly detailed, expert, or requiring great care, which until now no one has attempted to restore because of the envy of others. Now, although unconquered truth is commendable by its own strength alone and is sufficiently fortified by its own excellent powers—for nothing can endure that is not solidified in the very foundation of Nature and equipped with this invincible protection—nevertheless, the purity of my writing, being dedicated and consecrated to Your Highnesses and armed with such splendor, shall go forth more boldly into the light and the gaze of men with doubled strength. Receive it, therefore, with a serene countenance, Most Serene and