First Sentence

"In this present treatise, I have ventured to make some observations upon experimental philosophy, and to examine the opinions of some of our modern microscopical or dioptrical writers: and, though your Grace is not only a lover of virtuosos, but a virtuoso yourself, and have as good, and as many sorts of optic glasses as anyone else; yet you do not busy yourself much with this brittle art, but employ most part of your time in the more noble and heroic art of horsemanship and weapons, as also in the sweet and delightful art of poetry, and in the useful art of architecture, etc. which shows that you do not believe much in the informations of those optic glasses, at least think them not so useful as others do, that spend most of their time in dioptrical inspections."