1. The window's surface is usually structured like a honeycomb made of convex lenses . 2. Drebbel became famous for his invention in 1621 of a microscope with two convex lenses . 3. French mathematician, Jean-Fran�ois Nic�ron ( 1613-1646 ) wrote about the camera obscura with convex lenses . 4. The concave and convex lenses from Ultima VI are also required to complete the quest. 5. She has packaged her messages variously, printing images on vinyl and on convex lenses called lenticulars. 6. A single convex lens was used in the preparation of some of the drawings for this book. 7. Images of black letters in a thin convex lens of focal length " f " are shown in red. 8. The " Dall null test " uses a plano-convex lens placed a short distance in front of the pinhole. 9. In a later edition of his " Natural Magic ", della Porta described this device as having a convex lens . 10. The specific epithet " " is from the Latin meaning " like a double-convex lens ", referring to the leaf shape.
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