Christiani Hugenii Zelemii, dum viveret, toparchae opuscula postuma, quae continent dioptricam. Commentarios de vitris figurandis. Dissertationem de corona & parheliis. Tractatum de motu. De vi centrifuga. Descriptionem automati planetarii

A decorative drop cap Q features floral and foliate motifs.WHAT the Most Noble Huygens desired from us in his last will, and what we accepted to do according to his wishes, we perform today by publishing these minor works. We have brought them to the public light to the best of our ability, after having examined his writings with great labor. Just as we have performed this most willingly, led by a pious duty toward this great man, so we have not doubted that these works—which proceed now by our counsel, but which you have not disdained to approve by your authority—should be inscribed to your Illustrious Names. For this was required, beyond the favor—well known to the entire literary world—with which you pursue learning and those who cultivate it, by the clearly expressed will of the Author, from which it was a matter of conscience for us to deviate as little as possible in all these things. For since it pleased him to bequeath his writings to the Academy of Leiden, to which